5(x-y)^2-7(x-y)-6因式分解
问题描述:
5(x-y)^2-7(x-y)-6因式分解
答
把x-y看成一个整体
5(x-y)^2-7(x-y)-6
=[5(x-y)+3][(x-y)-3]
=(5x-5y+3)(x-y-3)