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17 October, 19:31

Solve x2 6x = 7 by completing the square. what is the solution set of the equation?

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  1. 17 October, 21:31
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    How to solve x^2 + 6x = 7:

    x^2 + 6x + 9 = 16 << First, find the c term by doing (b/2) ^2. (6/2) ^2 is 9, so add 9 to both sides of the equation.

    (x + 3) ^2 = 16 << Factor the left side.

    x+3 = plus or minus 4 <
    x = - 3 - 4, - 3 + 4 << Subtract the 3

    x = - 7, 1
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