x^2-2y^2-xy-x-y因式分解~
问题描述:
x^2-2y^2-xy-x-y因式分解~
答
x²-2y²-xy-x-y
=(x²-y²)-(y²+xy)-(x+y)
=(x-y)(x+y)-y(x+y)-(x+y)
=(x+y)[(x-y)-y-1]
=(x+y)(x-2y-1)