1.把下列各式分解因式 (1)12a3b2-9a2b+3ab; (2)a(x+y)-(a-b)(x+y); (3)121x2-144y2;... 一、选择题 1.下列各式中从左到右的变形,是因式分解的是( ) (A)(a+3)(a...

每一个 ± 符号,都有正负两种情况,每一组绝对值,就都有 4个分解因式,8个整式乘法,如果把 8 个整式乘法都算出来,再做因式分解,题目就不只 30个x＂ ± 5x ± 6,( x ± ...

因式分解3a3b2c-6a2b2c2+9ab2c3=3ab^2 c(a^2-2ac+3c^2) 因式分解xy+6-2x-3y=(x-3)(y-2)因式分解x2(x-y)+y2(y-x)=(x+y)(x-y)^2 因式分解2x2-(a-2b)x-ab=(2x-a)(x+b)因式分解...

y-x=-(x-y)-n-m=-(n+m)x(b-a)=(-x)(a-b)3(y-x^2)=-3(x^2-y)2a(y-x)^2=(2a)(x-y)^2-3a(y-x)^3=(3a)(x-y)^3(x+y)(x-y)=-(x+y)(y-x)3(2+x)(x-2)=(3)(x+2)(x-2)分解因式4x(2x-y)+2y(y-2x)=2(2x-...

1.因式分解abc+ab-4a=a(bc+b-4) 2.因式分解3a3b2c-6a2b2c2+9ab2c3=3ab^2 c(a^2-2ac+3c^2) 3.因式分解xy+6-2x-3y=(x-3)(y-2) 4.因式分解x2(x-y)+y2(y-x)=(x+y)(x-y)^2 5.因...

1.a^4-4a+3 2.(a+x)^m+1*(b+x)^n-1-(a+x)^m*(b+x)^n 3.x^2+(a+1/a)xy+y^2 4.9a^2-4b^2+4bc-c^2 5.(c-a)^2-4(b-c)(a-b) 答案1.原式=a^4-a-3a+3=(a-1)(a^3+a^2+a-3) 2.[1-(a+x)^m...

1)x^2-5x-36=(x-9)(x+4)2)x^2-14x+24=(x-2)(x-12)3)x^2-2x-8 =(x-4)(x+2)4)-a^2-3a-2 =-(x+1)(x+2)5)x^4+x^3+6x^2+5x+5 =(x^4+5x^2)+(x^3+5x)+(x^2+5 )=(x^2+5 )(x^2+x+1)6)14(m...

一、十字相乘法:2x2+3xy-y2 1 2 a2-ab-6b2 1 2=(x+2y)(2x-y) 2 -1 =(a+2b) (a-3b) 1 -3二、配方法:x2-4xy+3y...

(1)-2x5n-1yn+4x3n-1yn+2-2xn-1yn+4; (2)x3-8y3-z3-6xyz; (3)a2+b2+c2-2bc+2ca-2ab; ... =(a+b)2(a-b)(a4-a3b+a2b2-ab3+b4) 分解因式: (1)x9+x6+x3-3; (2)(m2-1)(n2-1)+4...