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9 August, 22:52

Solve the quadratic equation by completing the square.

x2 + 6x + 7 = 0

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Answers (1)
  1. 9 August, 23:11
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    from the equation x^2 - 6x + 7 = 0, b is equal to - 6. The form should become y = (x - (b/2) ^2) + c. (b/2) ^2 is equal to 9. Hence,

    0 = (x - 3) ^2 - 9 + 7

    0 = (x - 3) ^2 - 2

    2 = (x - 3) ^2

    x should be equal to - 1.5858 and - 4.4142
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