(x-y)(6x-6y-7)-5 因式分解

分类: 作业答案 • 2021-12-19 17:21:43

问题描述：

答

(x-y)(6x-6y-7)-5
=(x-y)[6(x-y)-7]-5
=6(x-y)²-7(x-y)-5
=[3(x-y)-5][2(x-y)+1]
=(3x-3y-5)(2x-2y+1)

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)