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3 May, 18:31

Solve the equation by completing the square x^2-18x+58=0

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  1. 3 May, 20:02
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    We want to add something to the right side of the equation to get 81.

    x^2 - 18x + 81 = 23

    The final step is to factor and subtract 23. (Subtracting 23 is a unnecessary, but whatever)

    (x - 9) ^2 - 23 = 0

    So "x" = 9 + sqrt23
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