因式分解:x的平方-xy-4x+4y

问题描述:

因式分解:x的平方-xy-4x+4y

x^2-xy-4x+4y =x(x-y)-4(x-y) =(x-4)(x-y)

x的平方-xy-4x+4y
=x(x-y)-4(x-y)
=(x-y)(x-4)