25(x-1)²-100=0

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25(x-1)²-100=0
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25(x-1)²-100=0
25(x-1)²-100=0

25(x-1)²-100=0
25(x-1)²-100=0
(x-1)²=100÷25
(x-1)²=4
x-1=±2
x1=3
x2=-1