5x(x-2y)的平方-10y(2y-x)平方
问题描述:
5x(x-2y)的平方-10y(2y-x)平方
答
5x(x-2y)的平方-10y(2y-x)平方
=5x(x-2y)^2-10y(x-2y)^2
=(5x-10y)(x-2y)^2
=5(x-2y)^3