2xsquare-2underroot2x +1=0solvewithquadraticformula
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⇨2x²-2√2x+1=0
⇨2x²-√2x-√2x+1=0
⇨√2x(√2x-1)-1(√2x-1)=0
⇨(√2x-1)(√2x-1)=0
⇨x=1/√2 , 1/√2
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