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March 24, 2017

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Solve the Following quadratic equations by completing the square.

7x(squared)+4x-13=8

  • Math - ,

    7x^2 + 4x - 13 = 8

    multiply by 7 to get a perfect square on the 2nd-degree term:

    49x^2 + 28x = 147
    49x^2 + 28x + 4 = 147 + 4
    (7x+2)^2 = 151
    7x = -2 ± √151

    x = (-2 ± √151)/7

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