x的平方-xy-2x+2y,分解公因式 急

问题描述:

x的平方-xy-2x+2y,分解公因式 急

x的平方-xy-2x+2y
=x(x-y)-2(x-y)
=(x-y)(x-2)

x^2-xy-2x+2y
=x^2-2x-xy+2y
=x(x-2)-y(x-2)
=(x-2)(x-y)