m(x-y)二次方+n(y-x)三次方因式分解
问题描述:
m(x-y)二次方+n(y-x)三次方因式分解
答
4m^2(x-y)^3+(y-x)^3(m-n)^2
=(x-y)^3{4m^2-(m-n)^2}
=(x-y)^3(2m+m-n)(2m-m+n)
=(x-y)^3(3m-n)(m+n)
打字不易,