Question

老师给同学们出示了这样一道题目:把多项式3(x-y)^3-(y-x)^2分解因式

拜托各位大虾出手相助，本人感激不尽！！！！！！

Answer 1

3(x-y)^3-(y-x)^2
=3(x-y)^3-(x-y)^2
=(x-y)^2[3(x-y)]
=3(x-y)^3
大概是这样做的,错了别怨我!

Answer 2

3(x-y)³-(y-x）²
=3（x-y）³-（x-y）²
=（x-y）²[3（x-y）-1]
=（x-y）²（3x-3y-1）