目录初一整式计算题50道 整式计算题100道附答案初一 七年级整式计算题100道 初一整式的乘除计算题100道 初一数学整式难题及答案
1銆佸凡鐭�A,B鏄�鏂圭▼x^2+2x-5=0鐨勪袱涓�瀹炴暟鏍�, 姹�(A^2+2AB+2A)(B^2+2AB+2B)鐨勫��. 鐢盇,B鏄�鏂圭▼x^2+2x-5=0鐨勪袱涓�瀹炴暟鏍瑰緱锛� AB=-5锛孉+B=-2 A^2+2AB+2A)(B^2+2AB+2B) =AB锛圓+2B+2锛夛紙B+2A+2锛� =-5锛�-2+B+2锛夛紙-2+A+2锛� =-5AB =25 2銆�1/2(x+y+z)鏂�+1/2(x-y-z)(x-y+z)-z(x+y),鍏朵腑x-y=6,xy=21.瑕佽�︾粏姝ラ�� 鍖栫畝寰楋細 1/2(x+y+z)鏂�+1/2(x-y-z)(x-y+z)-z(x+y)= 1/2[(x+y)鏂�+2z(x+y)+z鏂筣+1/2[(x-y)鏂�-z鏂筣-z(x+y)= 1/2(x+y)鏂�+1/2(x-y)鏂�=x鏂癸紜y鏂� 鐢眡-y=6,xy=21寰楃ⅶ铏氾紝x鏂癸紜y鏂癸紳锛坸-y锛夋柟锛�2xy锛�78 3銆乤^2-ab+2b^2=3 姹�2ab-2a^2-4b^2-7鐨勫�� 2ab-2a^2-4b^2-7 =2(ab-a^2-2b^2)-7 =-2(a^2-ab+2b^2)-7 =(-2)*3-7 =-6-7=-13 4銆佽嫢A=2x^2+3xy-2x-3,B=-x^2+xy+2,涓�3A+6B鐨勫�间笌x鏃犲叧锛屾眰y鐨勫�� 瑙ｏ細 3A+6B=6x^2+9xy-6x-9-6x^2+6xy+12 =15xy-6x+3 =x(15y-6)+3 5銆�9x+6x^2 -3(x-2/3x^2).鍏朵腑x=-2 9x+6x�0�5 -3(x-2/3x�0�5) =9x+6x�0�5-3x+2x�0�5 =8x�0�5+6x =8脳(-2)�0�5+6脳(-2) =32-12 =20 6銆�1/4(-4x^2+2x-8)-(1/2x-1),鍏朵腑x=1/2 1/4(-4x�0�5+2x-8)-(1/2x-1) =-x�0�5+1/2x-2-1/2x+1 =-x�0�5-1 =-(1/2)�0�5-1 =-1/4-1 =-5/4 7銆�3x'y-[2x'y-(2xyz-x'z)-4x'z]-xyz,鍏朵腑x=-2,y=-3,z=1, :3x'y-[2x'y-(2xyz-x'z)-4x'z]-xyz =3x'y-2x'y+2xyz-x'z+4x'z-xyz =x'y-xyz+3x'z =4*(-3)-2*3*1+3*4*1 =-12-6+12 =-6 8銆�(5a^2-3b^2)+(a^2+b^2)-(5a^2+3b^2),鍏朵腑a=-1,b=1 =5a^2-3b^2+a^2+b^2-5a^2-3b^2 =a^2-5b^2 =(-1)^2-5*1^2 =1-5 =-4 9銆�2(a^2b+ab^2)-2(a^2 b-1)-2ab^2 -2鍏朵腑a=-2,b=2 =2a^2b+2ab^2-2a^2b+2-2ab^2-2 =0 10銆�(X-2鍒嗕箣1Y-1)(X-2鍒嗕箣1Y+1)-(X-2鍒嗕箣1Y-1)鐨勫钩鏂� 鍏朵腑X=1.7,Y=3.9(鍏堝寲绠�鍐嶆眰鍊�) [(X-2鍒嗕箣1Y)-1][(X+2鍒嗕箣1Y)+1]-(X-2鍒嗕箣1Y-1)骞虫柟 =(X+2鍒嗕箣1Y)骞虫柟-1-(X-2鍒嗕箣1Y)骞虫柟+2(X-2鍒嗕箣1Y)-1 =(X+2鍒嗕箣1Y)骞虫柟-(X-2鍒嗕箣1Y)骞虫柟+2(X-2鍒嗕箣1Y)-2 =2XY+2X-Y-2 =3.9*2.4+1.4 =10.76 鍖栭棿姹傚��: 涓嬮潰鐨勪綘鑷�宸辨眰鍚�``` 1銆�-9(x-2)-y(x-5) 锛�1锛夊寲绠�鏁村潶宸т釜寮忓瓙銆� 锛�2锛夊綋x=5鏃讹紝姹倅鐨勮В銆� 2銆�5(9+a)脳b-5(5+b)脳a 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 锛�2锛夊綋a=5/7鏃讹紝姹傚紡瀛愮殑鍊笺�� 3銆�62g+62(g+b)-b 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 锛�2锛夊綋g=5/7鏃讹紝姹俠鐨勮В銆� 4銆�3(x+y)-5(4+x)+2y 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 5銆�(x+y)(x-y) 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 6銆�2ab+a脳a-b 锛�1锛夊寲绠�鏁翠釜寮忓瓙璁╂収閿�銆� 7銆�5.6x+4(x+y)-y 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 8銆�6.4(x+2.9)-y+2(x-y) 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 9銆�(2.5+x)(5.2+y) 锛�1锛夊寲绠�鏁翠釜寮忓瓙銆� 10銆�9.77x-(5-a)x+2a (5a^2-3b^2)+(a^2+b^2)-(5a^2+3b^2),鍏朵腑a=-1,b=1 =5a^2-3b^2+a^2+b^2-5a^2-3b^2 =a^2-5b^2 =(-1)^2-5*1^2 =1-5 =-4 2(a^2b+ab^2)-2(a^2 b-1)-2ab^2 -2鍏朵腑a=-2,b=2 =2a^2b+2ab^2-2a^2b+2-2ab^2-2 =0 x+7-(-36+8^2)/2=[-(-8x)+7^4]/3*(8^2-6x) (a-7)-(-98a)+7a=[(3.2*5a)2^5]/10 (89/2+5x)+35/6x=[3*(-9+5)+2^3]/5+7x [3X+(-189+5^2)/3]/8=521/2 4y+[119*(-5^3y+8/7)-8/3]=22/11 (3X*189)+{5*6+[-5/8*(-65*8^3)]+9/2} 7(2x-1)-3(4x-1)=4(3x+2)-1 (5y+1)+ (1-y)= (9y+1)+ (1-3y) [-6(-7^4*8)-4]=x+2 20%+(1-20%)(320-x)=320脳40% 2(x-2)+2=x+1 2(x-2)-3(4x-1)=9(1-x) 11x+64-2x=100-9x 15-(8-5x)=7x+(4-3x) 3(x-7)-2[9-4(2-x)]=22 3/2[2/3(1/4x-1)-2]-x=2 2x+7^2=157 9x+6x�0�5 -3(x-2/3x�0�5) =9x+6x�0�5-3x+2x�0�5 =8x�0�5+6x =8脳(-2)�0�5+6脳(-2) =32-12 =20 1/4(-4x�0�5+2x-8)-(1/2x-1) =-x�0�5+1/2x-2-1/2x+1 =-x�0�5-1 =-(1/2)�0�5-1 =-1/4-1 =-5/4 3锛�3ab-4ab+8ab-7ab+ab=______锛� 4锛�7x-(5x-5y)-y=______锛� 5锛�23a3bc2-15ab2c+8abc-24a3bc2-8abc=______锛� 6锛�-7x2+6x+13x2-4x-5x2=______锛� 7锛�2y+(-2y+5)-(3y+2)锛漘_____锛� 11锛�(2x2-3xy+4y2)+(x2+2xy-3y2)=______锛� 12锛�2a-(3a-2b+2)+(3a-4b-1)=______锛� 13锛�-6x2-7x2+15x2-2x2锛漘_____锛� 14锛�2x-(x+3y)-(-x-y)-(x-y)锛漘_____锛� 16锛�2x+2y-[3x-2(x-y)]=______锛� 17锛�5-(1-x)-1-(x-1)=______锛� 18锛�( )+(4xy+7x2-y2)=10x2-xy锛� 19锛�(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3锛� 21锛庡凡鐭�A=x3-2x2+x-4锛孊=2x3-5x+3锛岃�＄畻A+B=______锛� 22锛庡凡鐭�A=x3-2x2+x-4锛孊=2x3-5x+3锛岃�＄畻A-B=______锛� 23锛庤嫢a=-0.2锛宐=0.5锛屼唬鏁板紡-(|a2b|-|ab2|)鐨勫�间负______锛� 25锛庝竴涓�澶氶」寮忓噺鍘�3m4-m3-2m+5寰�-2m4-3m3-2m2-1锛岄偅涔堣繖涓�澶氶」寮忕瓑浜巁_____锛� 26锛�-(2x2-y2)-[2y2-(x2+2xy)]=______锛� 27锛庤嫢-3a3b2涓�5ax-1by+2鏄�鍚岀被椤癸紝鍒檟=______锛寉=______锛� 28锛�(-y+6+3y4-y3)-(2y2-3y3+y4-7)锛漘_____锛� 29锛庡寲绠�浠ｆ暟寮�4x2-[7x2-5x-3(1-2x+x2)]鐨勭粨鏋滄槸______锛� 30锛�2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( )锛� 31锛�3a-(2a-3b)+3(a-2b)-b=______锛� 32锛庡寲绠�浠ｆ暟寮弜-[y-2x-(x+y)]绛変簬______锛� 33锛嶽5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1锛� 34锛�3x-[y-(2x+y)]=______锛� 35锛庡寲绠�|1-x+y|-|x-y|(鍏朵腑x锛�0锛寉锛�0)绛変簬______锛� 36锛庡凡鐭�x鈮�y锛寈+y-|x-y|=______锛� 37锛庡凡鐭�x锛�0锛寉锛�0锛屽寲绠�|x+y|-|5-x-y|=______锛� 38锛�4a2n-an-(3an-2a2n)锛漘_____锛� 39锛庤嫢涓�涓�澶氶」寮忓姞涓�-3x2y+2x2-3xy-4寰� 2x2y+3xy2-x2+2xy锛� 鍒欒繖涓�澶氶」寮忎负______锛� 40锛�-5xm-xm-(-7xm)+(-3xm)=______锛� 41锛庡綋a=-1锛宐=-2鏃讹紝 [a-(b-c)]-[-b-(-c-a)]锛漘_____锛� 43锛庡綋a=-1锛宐=1锛宑=-1鏃讹紝 -[b-2(-5a)]-(-3b+5c)锛漘_____锛� 44锛�-2(3x+z)-(-6x)+(-5y+3z)=______锛� 45锛�-5an-an+1-(-7an+1)+(-3an)锛漘_____锛� 46锛�3a-(2a-4b-6c)+3(-2c+2b)=______锛� 48锛�9a2+[7a2-2a-(-a2+3a)]=______锛� 50锛庡綋2y-x=5鏃讹紝5(x-2y)2-3(-x+2y)-100=______锛� (浜�)閫夋嫨 [ ] A锛�2锛� B锛�-2锛� C锛�-10锛� D锛�-6锛� 52锛庝笅鍒楀悇寮忎腑璁＄畻缁撴灉涓�-7x-5x2+6x3鐨勬槸 [ ] A锛�3x-(5x2+6x3-10x)锛� B锛�3x-(5x2+6x3+10x)锛� C锛�3x-(5x2-6x3+10x)锛� D锛�3x-(5x2-6x3-10x)锛� 53锛庢妸(-x-y)+3(x+y)-5(x+y)鍚堝苟鍚岀被椤瑰緱 [ ] A锛�(x-y)-2(x+y)锛� B锛�-3(x+y)锛� C锛�(-x-y)-2(x+y)锛� D锛�3(x+y)锛� 54锛�2a-[3b-5a-(2a-7b)]绛変簬 [ ] A锛�-7a+10b锛� B锛�5a+4b锛� C锛�-a-4b锛� D锛�9a-10b锛� 55锛庡噺鍘�-3m绛変簬5m2-3m-5鐨勪唬鏁板紡鏄� [ ] A锛�5(m2-1)锛� B锛�5m2-6m-5锛� C锛�5(m2+1)锛� D锛�-(5m2+6m-5)锛� 56锛庡皢澶氶」寮�2ab-9a2-5ab-4a2涓�鐨勫悓绫婚」鍒嗗埆缁撳悎鍦ㄤ竴璧凤紝搴斾负 [ ] A锛�(9a2-4a2)+(-2ab-5ab)锛� B锛�(9a2+4a2)-(2ab-5ab)锛� C锛�(9a2-4a2)-(2ab+5ab)锛� D锛�(9a2-4a2)+(2ab-5ab)锛� 57锛庡綋a=2锛宐=1鏃讹紝-a2b+3ba2-(-2a2b)绛変簬 [ ] A锛�20锛� B锛�24锛� C锛�0锛� D锛�16锛� 涓�锛屾�ｇ‘鐨勯�夋嫨鏄� [ ] A锛庢病鏈夊悓绫婚」锛� B锛�(2)涓�(4)鏄�鍚岀被椤癸紱 C锛�(2)涓�(5)鏄�鍚岀被椤癸紱 D锛�(2)涓�(4)涓嶆槸鍚岀被椤癸紟 59锛庤嫢A鍜孊鍧囦负浜旀�″�氶」寮忥紝鍒橝-B涓�瀹氭槸 [ ] A锛庡崄娆″�氶」寮忥紱 B锛庨浂娆″�氶」寮忥紱 C锛庢�℃暟涓嶉珮浜庝簲娆＄殑澶氶」寮忥紱 D锛庢�℃暟浣庝簬浜旀�＄殑澶氶」寮忥紟 60锛�-锝沎-(x+y)]锝�+锝�-[(x+y)]锝濈瓑浜� [ ] A锛�0锛� B锛�-2y锛� C锛巟+y锛� D锛�-2x-2y锛� 61锛庤嫢A=3x2-5x+2锛孊=3x2-5x+6锛屽垯A涓嶣鐨勫ぇ灏忔槸 [ ] A锛嶢锛濨锛� B锛嶢=B锛� C锛嶢锛淏锛� D锛庢棤娉曠‘瀹氾紟 62锛庡綋m=-1鏃讹紝-2m2-[-4m2+(-m2)]绛変簬 [ ] A锛�-7锛� B锛�3锛� C锛�1锛� D锛�2锛� 63锛庡綋m=2锛宯=1鏃讹紝澶氶」寮�-m-[-(2m-3n)]+[-(-3m)-4n]绛変簬 [ ] A锛�1锛� B锛�9锛� C锛�3锛� D锛�5锛� [ ] 65锛�-5an-an-(-7an)+(-3an)绛変簬 [ ] A锛�-16an锛� B锛�-16锛� C锛�-2an锛� D锛�-2锛� 66锛�(5a-3b)-3(a2-2b)绛変簬 [ ] A锛�3a2+5a+3b锛� B锛�2a2+3b锛� C锛�2a3-b2锛� D锛�-3a2+5a-5b锛� 67锛巟3-5x2-4x+9绛変簬 [ ] A锛�(x3-5x2)-(-4x+9)锛� B锛巟3-5x2-(4x+9)锛� C锛�-(-x3+5x2)-(4x-9)锛� D锛巟3+9-(5x2-4x)锛� [ ] 69锛�4x2y-5xy2鐨勭粨鏋滃簲涓� [ ] A锛�-x2y锛� B锛�-1锛� C锛�-x2y2锛� D锛庝互涓婄瓟妗堥兘涓嶅�癸紟 (涓�)鍖栫畝 70锛�(4x2-8x+5)-(x3+3x2-6x+2)锛� 72锛�(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2)锛� 73锛�-{2a2b-[3abc-(4ab2-a2b)]锝濓紟 74锛�(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b)锛� 75锛�(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2)锛� 76锛�(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4)锛� 77锛�(4a-2b-c)-5a-[8b-2c-(a+b)]锛� 78锛�(2m-3n)-(3m-2n)+(5n+m)锛� 79锛�(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab)锛� 80锛巟y-(2xy-3z)+(3xy-4z)锛� 81锛�(-3x3+2x2-5x+1)-(5-6x-x2+x3)锛� 83锛�3x-(2x-4y-6x)+3(-2z+2y)锛� 84锛�(-x2+4+3x4-x3)-(x2+2x-x4-5)锛� 85锛庤嫢A=5a2-2ab+3b2锛孊=-2b2+3ab-a2锛岃�＄畻A+B锛� 86锛庡凡鐭�A=3a2-5a-12锛孊=2a2+3a-4锛屾眰2(A-B)锛� 87锛�2m-{-3n+[-4m-(3m-n)]锝濓紟 88锛�5m2n+(-2m2n)+2mn2-(+m2n)锛� 89锛�4(x-y+z)-2(x+y-z)-3(-x-y-z)锛� 90锛�2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2)锛� 92锛�2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2)锛� 94锛�4x-2(x-3)-3[x-3(4-2x)+8]锛� (鍥�)灏嗕笅鍒楀悇寮忓厛鍖栫畝锛屽啀姹傚�� 97锛庡凡鐭�a+b=2锛宎-b=-1锛屾眰3(a+b)2(a-b)2-5(a+b)2脳(a-b)2鐨勫�硷紟 98锛庡凡鐭�A=a2+2b2-3c2锛孊=-b2-2c2+3a2锛孋=c2+2a2-3b2锛屾眰(A-B)+C锛� 99锛庢眰(3x2y-2xy2)-(xy2-2x2y)锛屽叾涓瓁=-1锛寉=2锛� 101锛庡凡鐭�|x+1|+(y-2)2=0锛屾眰浠ｆ暟寮�5(2x-y)-3(x-4y)鐨勫�硷紟 106锛庡綋P=a2+2ab+b2锛孮=a2-2ab-b2鏃讹紝姹侾-[Q-2P-(P-Q)]锛� 107锛庢眰2x2-锝�-3x+5+[4x2-(3x2-x-1)]锝濈殑鍊硷紝鍏朵腑x=-3锛� 110锛庡綋x=-2锛寉=-1锛寊=3鏃讹紝姹�5xyz-锝�2x2y-[3xyz-(4xy2-x2y)]锝濈殑鍊硷紟 113锛庡凡鐭�A=x3-5x2锛孊=x2-6x+3锛屾眰A-3(-2B)锛� (浜�)缁煎悎缁冧範 115锛庡幓鎷�鍙凤細锝�-[-(a+b)]锝�-锝�-[-(a-b)]锝濓紟 116锛庡幓鎷�鍙凤細-[-(-x)-y]-[+(-y)-(+x)]锛� 117锛庡凡鐭�A=x3+6x-9锛孊=-x3-2x2+4x-6锛岃�＄畻2A-3B锛屽苟鎶婄粨鏋滄斁鍦ㄥ墠闈㈠甫鈥�-鈥濆彿鐨勬嫭鍙峰唴锛� 118锛庤�＄畻涓嬪紡锛屽苟鎶婄粨鏋滄斁鍦ㄥ墠闈㈠甫鈥�-鈥濆彿鐨勬嫭鍙峰唴锛� (-7y2)+(-4y)-(-y2)-(+5y)+(-8y2)+(+3y)锛� 119锛庡幓鎷�鍙枫�佸悎骞跺悓绫婚」锛屽皢缁撴灉鎸墄鐨勫崌骞傛帓鍒楋紝骞舵妸鍚庝笁椤规斁鍦ㄥ甫鏈夆��-鈥濆彿鐨勬嫭鍙峰唴锛� 120锛庝笉鏀瑰彉涓嬪紡鐨勫�硷紝灏嗗叾涓�鍚勬嫭鍙峰墠鐨勭�﹀彿閮藉彉鎴愮浉鍙嶇殑绗﹀彿锛�(x3+3x2)-(3x2y-7xy)+(2y3-3y2)锛� 121锛庢妸澶氶」寮�4x2y-2xy2+4xy+6-x2y2+x3-y2鐨勪笁娆￠」鏀惧湪鍓嶉潰甯︽湁鈥�-鈥濆彿鐨勬嫭鍙峰唴锛屼簩娆￠」鏀惧湪鍓嶉潰甯︽湁鈥�+鈥濆彿鐨勬嫭鍙峰唴锛屽洓娆￠」鍜屽父鏁伴」鏀惧湪鍓嶉潰甯︽湁鈥�-鈥濆彿鐨勬嫭鍙峰唴锛� 122锛庢妸涓嬪垪澶氶」寮忕殑鎷�鍙峰幓鎺夛紝鍚堝苟鍚岀被椤癸紝骞跺皢鍏跺悇椤规斁鍦ㄥ墠闈㈠甫鏈夆��-鈥濆彿鐨勬嫭鍙峰唴锛屽啀姹�2x-2[3x-(5x2-2x+1)]-4x2鐨勫�硷紝鍏朵腑x=-1锛� 123锛庡悎骞跺悓绫婚」锛� 7x-1.3z-4.7-3.2x-y+2.1z+5-0.1y锛� 124锛庡悎骞跺悓绫婚」锛�5m2n+5mn2-mn+3m2n-6mn2-8mn锛� 126锛庡幓鎷�鍙凤紝鍚堝苟鍚岀被椤癸細 (1)(m+1)-(-n+m)锛� (2)4m-[5m-(2m-1)]锛� 127锛庡寲绠�锛�2x2-锝�-3x-[4x2-(3x2-x)+(x-x2)]锝濓紟 128锛庡寲绠�锛�-(7x-y-2z)-锝沎4x-(x-y-z)-3x+z]-x锝濓紟 129锛庤�＄畻锛�(+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a)锛� 130锛庡寲绠�锛歛3-(a2-a)+(a2-a+1)-(1-a4+a3)锛� 131锛庡皢x2-8x+2x3-13x2-2x-2x3+3鍏堝悎骞跺悓绫婚」锛屽啀姹傚�硷紝鍏朵腑x=-4锛� 132锛庡湪鎷�鍙峰唴濉�涓婇�傚綋鐨勯」锛歔( )-9y+( )]+2y2+3y-4=11y2-( )+13锛� 133锛庡湪鎷�鍙峰唴濉�涓婇�傚綋鐨勯」锛� (-x+y+z)(x+y-z)=[y-( )][y+( )]锛� 134锛庡湪鎷�鍙峰唴濉�涓婇�傚綋鐨勯」锛� (3x2+xy-7y2)-( )=y2-2xy-x2锛� 135锛庡湪鎷�鍙峰唴濉�涓婇�傚綋鐨勯」锛� (1)x2-xy+y-1=x2-( )锛� (2)[( )+6x-7]-[4x2+( )-( )]=x2-2x+1锛� 136锛庤�＄畻4x2-3[x+4(1-x)-x2]-2(4x2-1)鐨勫�硷紟 137锛庡寲绠�锛� 138锛庣敤绔栧紡璁＄畻 (-x+5+2x4-6x3)-(3x4+2x2-3x3-7)锛� 139锛庡凡鐭�A=11x3+8x2-6x+2锛孊=7x3-x2+x+3锛屾眰2(3A-2B)锛� 140锛庡凡鐭�A=x3-5x2锛孊=x3-11x+6锛孋=4x-3锛屾眰 (1)A-B-C锛� (2)(A-B-C)-(A-B+C)锛� 141锛庡凡鐭�A=3x2-4x3锛孊=x3-5x2+2锛岃�＄畻 (1)A+B锛� (2)B-A锛� 142锛庡凡鐭�x锛�-4锛屽寲绠�|-x|+|x+4|-|x-4|锛� 146锛庢眰涓や唬鏁板紡-1.56a+3.2a3-0.47锛�2.27a3-0.02a2+4.03a+0.53鐨勫樊涓�6-0.15a+3.24a2+5.07a3鐨勫拰锛� -0.3锛寉=-0.2锛� 150锛庡凡鐭�(x-3)2+|y+1|+z2=0锛屾眰x2-2xy-5x2+12xz+3xy-z2-8xz-2x2鐨勫�硷紟
1.(374+55)+(253+25)+(347+526)
2.773-297+197
3.678+104-56
4.678+999+58
5.678-134+33
6.678-197+99
7.945-537-98+237
8.19+199+1999+19999
9.77+64+75-73
10.(2542+2543-2538)-2
11.56+22+44
12.67+(18+133)
13.728+34+76+272
14.327+466+(534+173)
15.585+(267+415)+733
16.874-(674+22)
17.571-36-64
18.672-(412+243)
19.7896-(1234+5896)
20.426+109-5
21.5678-4987+632
22.197+389-45
23.487+168-56
24.49+499-250
25.667+458-345
26.27+33+30-31
27.56+45-23
28.774+776-24
29.843+(365-243)
30.147+26+53-39
31.800-89+40
32.2784+4253-784
33.1668+65-24
34.9999+54-89
35.43+173-35
36.4123+3412-2341
37.8247-(247+159)
38.54+48-51
39.562+781-264
40.3+6-2
41.32-14+67
42.33+44-55
43.529+341-581
44.61+35-25
45.23-12+68
46.52+63-49
47.37+29-48
48.63-54+68
49.55-14+62
50.32+49-57
1.(374+55)+(253+25)+(347+526)
2.773-297+197
3.678+104-56
4.678+999+58
5.678-134+33
6.678-197+99
7.945-537-98+237
8.19+199+1999+19999
9.77+64+75-73
10.(2542+2543-2538)-2
11.56+22+44
12.67+(18+133)
13.728+34+76+272
14.327+466+(534+173)
15.585+(267+415)+733
16.874-(674+22)
17.571-36-64
18.672-(412+243)
19.7896-(1234+5896)
20.426+109-5
21.5678-4987+632
22.197+389-45
23.487+168-56
24.49+499-250
25.667+458-345
26.27+33+30-31
27.56+45-23
28.774+776-24
29.843+(365-243)
30.147+26+53-39
31.800-89+40
32.2784+4253-784
33.1668+65-24
34.9999+54-89
35.43+173-35
36.4123+3412-2341
37.8247-(247+159)
38.54+48-51
39.562+781-264
40.3+6-2
41.32-14+67
42.33+44-55
43.529+341-581
44.61+35-25
45.23-12+68
46.52+63-49
47.37+29-48
48.63-54+68
49.55-14+62
50.32+49-57
澶熶簡娌℃湁锛屾壘鐨勫緢杈涜嫤鍟婏紒璁板緱閲囩撼锛屾渶濂藉姞濂借瘎~~~
1銆佽�佷娇鍏充簬X鐨勫�氶」寮廙X^3-2X^2+3X-4X^3+5X^2-NX涓嶅惈涓夋�￠」鍙婁竴娆￠」,鍒橫+N=?
2銆佸凡鐭�A-B=-6,鍒�3-(B-A)=澶氬皯锛�8-6A+6B=澶氬皯锛�
3銆佸�傛灉涓�涓�澶氶」寮廙鍑忓幓-3X+5锛屽緱5X^2-3X-1锛岄偅涔圡绛変簬澶氬皯锛�
4銆佸凡鐭�A=X^3-2X^2+1,B=3X^2-4X-3/2.姹�(1)3A+2B;(2)-2A-B
5銆佸凡鐭�A鏄�涓�涓�澶氶」寮�,鍦ㄨ�＄畻A-(2X^2+5X-3)鏃�,涓�涓�鍚屽�︽妸"A-"鍐欐垚浜�"A+",璁＄畻寰楀埌鐨勭粨鏋滄槸-X^2+3X-7,鍘熸潵杩欎釜寮忓瓙鏄�澶氬皯?姝ｇ‘鐨勭粨鏋滄槸澶氬皯?
6銆佺數褰遍櫌鐨勭��涓�鎺掓湁A涓�搴т綅,鍚庨潰娌′竴鎺掓瘮鍠婂拹鍓嶉潰涓�鎺掑�氫竴涓�搴т綅,鐢靛奖闄㈢殑绗琋鎺掓湁澶氬皯涓�
绛旀�堬細
1銆侀�栧厛瑕佺煡閬撲粈涔堟槸涓夋�￠」鍜屼竴娆￠」锛孧X^3銆�-4X^3灏辨槸3娆￠」锛孨X銆�3X灏辨槸涓�娆￠」锛屾牴鎹�棰樼洰瑕佹眰涓嶅惈涓夋�￠」鍙婁竴娆￠」锛屽垯M-4=0,M=4
锛�3-N=0,N=3
鍒欐墍浠�M+N=7
2銆侊紙1锛夎繖棰樼殑鎬濊矾鏄�鏀瑰彉杩愮畻绗﹀彿锛�3-(B-A)鏁寸悊寰�3-锛�-A+B锛夛紝鍐嶆�℃暣鐞嗗緱鍒�3+A-B锛屾妸宸叉枟澶х煡A-B=-6浠ｅ叆锛屾墍浠�3-(B-A)=-3
锛�2锛夐亾鐞嗗拰涓婁竴棰樹竴鏍凤紝鎶�8-6A+6B鏁寸悊寰楀埌8-6锛圓-B锛夛紝鎶婂凡鐭�A-B=-6浠ｅ叆锛屾墍浠�8-6A+6B=44
3銆侊紙1锛夎繖棰樼殑鎬濊矾鏄�閫嗛」鎬濈淮锛屾棦鐒朵竴涓�澶氶」寮廙鍑忓幓-3X+5锛屽緱5X^2-3X-1锛岄偅涔�5X^2-3X-1+锛�-3X+5锛�=M锛屾墍浠�M=5X^2-6X+4
4銆佽繖棰樺彧鑳界‖绠楋紝鍦ㄨ�＄畻鐨勮繃绋嬩腑璁颁綇鎶婂悓绫婚」鐢ㄥ悓涓�绉嶆柟寮忔爣鍑猴紝鍙�浠ヤ究浜庤繍绠椼��
锛�1锛�3A+2B=3X^3-8X
锛�2锛�-2A-B
=-2X^3+X^2+4X-1/2
5銆佽繖棰樼殑鎬濊矾鏄�鍏堟妸閮戦攢绾疉姹傚嚭锛孉+(2X^2+5X-3)=-X^2+3X-7锛孉=-3X^2-2X-4锛岀劧鍚庢妸A浠ｅ叆A-(2X^2+5X-3)涓�寰楀埌-5X^2-7X-1
6銆佹牴鎹�棰樻剰锛屽簲鍒楀嚭浠ヤ笅琛ㄦ牸锛�
1锛欰
2锛欰+1
3锛欰+2
銆�
銆�
銆�
N锛欰+N-1
缁撴灉鏄疉+N-1
1.n/3
2.x^2
3.-a^3
4.(ab)^6
5.(xy)^7
6.-1/4 *b+1
7.3xy-2y^2
8.-6a^2+2/3
9.a^(2m-3n)=a^2m/a^3n=(4*4)/鍑�鍝楄～(3*3*3)=16/27
10.绔嬫柟鐩�鑵斾綋琛ㄩ潰绉�=妫遍暱x妫遍暱x6=锛�3ab²锛塣2*6=54a^2*b^4
11.(1)锛坸+2锛夛紙x-a锛�=x^2+(2-a)x-2a,渚濋�樻剰锛�2-a=0锛宎=2
锛�2锛夛紙x+3锛夛紙3x-a锛�=3x^2+(9-a)x-3a,渚濋�樻剰,9-a=0,a=9
(3)锛坸+3锛夛紙x²+ax+b锛�=x^3+(3+a)x^2+(3a+b)x+3b,渚濋�樻剰,3+a=0,3a+b=0,寰梐=-3,b=9
12.(x-1)^4=x^4-4x^3+6x^2-4x+1,鎵�浠�a鈭�4=1锛宎鈭�3=-4锛宎鈭�2=6锛宎鈭�1=-4锛宎鈭�0=1
锛�1锛�0 锛�2锛�16锛�3锛夎姦鐬�-16锛�4锛�-48
13.1.a²+b² =锛坅+b锛塣2-2ab=31
2.锛坅-b锛�²=(a+b)^2-4ab=26
3.a-b=姝ｈ礋鏍瑰彿26
14.锛坅+b锛�²=11锛岋紙a-b锛�²=3锛屼袱寮忕浉鍑忓緱ab=2銆�1.a²+b²= 11-2ab=72.ab=2
15.姝ｈ礋1/3
16.3y^2-2
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1锛�3ab-4ab+8ab-7ab+ab=______锛�
2锛�7x-(5x-5y)-y=______锛�
3锛�23a3bc2-15ab2c+8abc-24a3bc2-8abc=______锛�
4锛�-7x2+6x+13x2-4x-5x2=______锛�
5锛�2y+(-2y+5)-(3y+2)锛漘_____锛�
6锛�(2x2-3xy+4y2)+(x2+2xy-3y2)=______锛�
7锛�2a-(3a-2b+2)+(3a-4b-1)=______锛�
8锛�-6x2-7x2+15x2-2x2锛漘_____锛�
9锛�2x-(x+3y)-(-x-y)-(x-y)锛漘_____锛�
10锛�2x+2y-[3x-2(x-y)]=______锛�
11锛�5-(1-x)-1-(x-1)=______锛�
12锛�(
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13锛�(4xy2-2x2y)-(
)=x3-2x2y+4xy2+y3锛�
14锛庡凡鐭ユ槍涓朅=x3-2x2+x-4锛孊=2x3-5x+3锛岃�＄畻A+B=______锛�
15锛庡凡鐭�A=x3-2x2+x-4锛孊=2x3-5x+3锛岃�＄畻A-B=______锛�
16锛庤嫢a=-0.2锛宐=0.5锛�浠ｆ暟寮�-(|a2b|-|ab2|)鐨勫�间负______锛�
17锛庝竴涓�澶氶」寮�鍑忓幓3m4-m3-2m+5寰�-2m4-3m3-2m2-1锛岄偅涔堣繖涓�澶氶」寮忕瓑浜巁_____锛�
18锛�-(2x2-y2)-[2y2-(x2+2xy)]=______锛�
19锛庤嫢-3a3b2涓�5ax-1by+2鏄�鍚岀被椤�锛屽垯x=______锛寉=______锛�
20锛�(-y+6+3y4-y3)-(2y2-3y3+y4-7)锛漘_____锛�
21锛庡寲绠�浠ｆ暟寮�4x2-[7x2-5x-3(1-2x+x2)]鐨勭粨鏋滄槸______锛�
22锛�2a-b2+c-d3=2a+(
)-d3=2a-d3-(
)=c-(
)锛�
23锛�3a-(2a-3b)+3(a-2b)-b=______锛�
24锛庡寲绠�浠ｆ暟寮弜-[y-2x-(x+y)]绛変簬______锛�
25锛嶽5a2+(
)a-7]+[(
)a2-4a+(
)]=a2+2a+1锛�
26锛�3x-[y-(2x+y)]=______锛�
27锛庡寲绠�|1-x+y|-|x-y|(鍏朵腑x锛�0锛寉锛�0)绛変簬______锛�
28锛庡凡鐭ュ墠鐩痻鈮�y锛寈+y-|x-y|=______锛�
29锛庡凡鐭�x锛�0锛寉锛�0锛屽寲绠�|x+y|-|5-x-y|=______锛�
30锛�4a2n-an-(3an-2a2n)锛漘_____锛�
31锛庤嫢涓�涓�澶氶」寮忓姞涓�-3x2y+2x2-3xy-4寰�
2x2y+3xy2-x2+2xy锛�
鍒欒繖涓�澶氶」寮忎负______锛�
32锛�-5xm-xm-(-7xm)+(-3xm)=______锛�
33锛庡綋a=-1锛宐=-2鏃讹紝
[a-(b-c)]-[-b-(-c-a)]锛漘_____锛�
34锛庡綋a=-1锛宐=1锛宑=-1鏃讹紝
-[b-2(-5a)]-(-3b+5c)锛漘_____锛�
35锛�-2(3x+z)-(-6x)+(-5y+3z)=______锛�
36锛�-5an-an+1-(-7an+1)+(-3an)锛漘_____锛�
37锛�3a-(2a-4b-6c)+3(-2c+2b)=______锛�
38锛�9a2+[7a2-2a-(-a2+3a)]=______锛�
39锛庡綋2y-x=5鏃讹紝5(x-2y)2-3(-x+2y)-100=______锛�
40.褰搙=-2鏃讹紝浜屾��涓夐」寮�2x2+mx+4鐨勫�肩瓑浜�18锛岄偅涔堝綋x=2鏃讹紝璇ヤ簩娆′笁椤瑰紡鐨勫�肩瓑浜�
41. 锛�2010•姊у窞锛夊厛鍖栫畝锛屽啀姹傚�硷細锛�-x2+5x+4锛�+锛�5x-4+2x2锛夛紝鍏朵腑x=-2锛�
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46.姹�
鐨勫�硷紝鍏朵腑x=-2锛寉=
锛�
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锛宐=-
锛�
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