提公因式m^2(x-y)+n^2(y-x)
问题描述:
提公因式m^2(x-y)+n^2(y-x)
答
m^2(x-y)+n^2(y-x)
=m^2(x-y)-n^2(x-y)
=(x-y)(m^2-n^2)
=(x-y)(m+n)(m-n)