Question

分解因式：(1)3a(m-n)-2b(m-n) (2)a(x-2)-b(x-2)+(2-x) (3)9(a-b)(a+b

Answer 1

3a(m-n)-2b(m-n) =(3a-2b)(m-n) a(x-2)-b(x-2)+(2-x)=(a-b-1)(x-2)

9(a-b)(a+b)-3(a-b)(a-b)=(6a+12b)(a-b)

)-2(b-2a)(b-2a)+(b-2a)=_(4a-b+1)(b-2a)

3(x+y)(y-x)-(x-y)(x-y)=(4x+2y)(y-x)

)-3(x-y)(x-y)-(y-x)(y-x)(y-x)=(x-y-3)(x-y)(x-y)