1/2(x-2)²-8＝0
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1/2(x-2)²-8＝01/2(x-2)²-8＝01/2(x-2)²-8＝01/2(x-2)^2=82(x-2)^2=1/8(x-2)^2=1/16x-2=土1/4x1
1/2(x-2)²-8＝0
1/2(x-2)²-8＝0
1/2(x-2)²-8＝0
1/2(x-2)^2=8
2(x-2)^2=1/8
(x-2)^2=1/16
x-2=土1/4
x1=9/4,x2=-7/4
x是6或者是-2