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10 June, 07:44

Solve for x in the equation x^2+2x+1=17

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  1. 10 June, 11:03
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    First, subtract 17 on both sides: x²+2x-16=0

    this cannot be factored, so use the quadratic formula to solve for x:

    b²-4ac=2²-4 (10 (-16) = 4+64=68

    √68=2√17

    so x = (-2+2√17) / 2 or x = (-2-2√17) / 2

    x=-1+√17 or x=-1-√17
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