(x-1)²-7(x-1)+6=0小弟没分了,
问题描述:
(x-1)²-7(x-1)+6=0小弟没分了,
答
把x-1看做一体
(x-1)²-7(x-1)+6=0
(x-1-1)(x-1-6)=0
(x-2)(x-7)=0
x=2或x=7