分解因式x(x-y)的二次-4x的三次y的二次

问题描述:

分解因式x(x-y)的二次-4x的三次y的二次

x(x-y)^2-4x^3y^2
=x[(x-y)^2-4x^2y^2]
=x(x-y-2xy)(x-y+2xy)
(x^3就是x的三次方)

x(x-y)²-4x³y²
=x(x-y)²-4x(x²y²)
=x[(x-y)²-(2xy)²]
=x(x-y+2xy)(x-y-2xy)