2(x-1)²=18 怎么算啊

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2(x-1)²=18怎么算啊2(x-1)²=18怎么算啊2(x-1)²=18怎么算啊2(x-1)²=18(x-1)²=9x-1=±3x1=4,x2=-

2(x-1)²=18 怎么算啊
2(x-1)²=18 怎么算啊

2(x-1)²=18 怎么算啊
2(x-1)²=18
(x-1)²=9
x-1=±3
x1=4,x2=-2

2(x-1)²=18 ,(x-1)²=9, x-1=±3,∴x=4、x=-2