【x-1】²-18=0
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【x-1】²-18=0【x-1】²-18=0【x-1】²-18=0(x-1)²=-8x-1=-3√2,x-1=3√2x=1-3√2,x=1+3√2(x-1)^2
【x-1】²-18=0
【x-1】²-18=0
【x-1】²-18=0
(x-1)²=-8
x-1=-3√2,x-1=3√2
x=1-3√2,x=1+3√2
(x-1)^2=18
x-1=正负3根号2
x=3根号2+1或-3根号2+1