(x-y)(6x-6y-7)-5 因式分解
问题描述:
(x-y)(6x-6y-7)-5 因式分解
答
原式=(x-y)[6(x-y)-7]-5
=6(x-y)²-7(x-y)-5
=[2(x-y)+1][3(x-y)-5]
=(2x-2y+1)(3x-3y-5)