计算2(x-1)²-1=17,（2x-1）³-1=7
问题描述：
计算2(x-1)²-1=17,（2x-1）³-1=7
答
2(x-1)²-1=17
(x-1)²-3²=0
(x-1+3)(x-1-3)=0
(x+2)(x-4)=0
x1=-2
x2=4
（2x-1）³-1=7
(2x-1)³=2³
2x-1=2
x=3/2