Solve using the quadratic formula : x^2-4x+1=0
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The correct answer is x=2±√5
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-(-4)+or-√(-4)^2-4(1)(1)/2(1)
4+or- √16-4 /2
4+or-√12/2
4+or-4√3/2
(4+4√3/2) or (4-4√3/2)
(2+2√3) or (2-2√3)
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