Question

超简单的因式分解1、a(x-y)-b(x-y)-c(y-x)2、(b-a)^2-2a+2b3、x(x-y)(a-b)-y

Answer 1

a(x-y)-b(x-y)-c(y-x)

=a(x-y)-b(x-y)+c(x-y)

=(a-b+c)(x-y)

(b-a)^2-2a+2b

=-(a-b)^2-2(a-b)

=-4(a-b)

x(x-y)(a-b)-y(y-x)(b-a)

=(x-y)2(a-b)