Question

因式分解1.（a^2b^2+1)-4a^2b^2)2 4m^2(x-y)+n^2(y-x) 3 (x-1)^2-1+x打

Answer 1

1、题目有问题?

2、

4m^2(x-y)+n^2(y-x)

＝4m^2(x-y)-n^2(x-y)

＝(4m^2-n^2)(x-y)

＝(2m+n)(2m-n)(x-y)

3、

(x-1)^2-1+x

＝(x-1)^2+(x-1)

=(x-1)(x-1+1)

=x(x-1)