2(X-1)二次方-18=0
问题描述：
2(X-1)二次方-18=0
答
2(x-1)²=18
(x-1)²=9
∴x-1=3 x-1=-3
∴x=4或x=-2
2(X-1)二次方-18=0
2(x-1)²=18
(x-1)²=9
∴x-1=3 x-1=-3
∴x=4或x=-2