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9 February, 14:57

If x^2 is added to x, the sum is 56. Which of the following could be the value of x?

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Answers (1)
  1. 9 February, 15:11
    0
    -8, 7

    Step-by-step explanation:

    Set up an equation.

    x² + x = 56

    Set the equation equal to zero and factor.

    x² + x - 56 = 0

    (x + 8) (x - 7) = 0

    Solve for x.

    x + 8 = 0

    x = - 8

    x - 7 = 0

    x = 7

    The possible x values are - 8 and 7.
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