Answers

2016-06-26T21:37:12+08:00
     2(x-1)²  =   32
       (x-1)²   =   32/2  = 16
    then take the sqrt of both sides
    thus x-1 = + or - 4
            x =  4 + 1 =   5             /   when x =  4
           or   x  =  - 4 +1 = -3     /  when x  =  -4
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