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1 April, 06:07

Which value for x makes the open sentence true? 8 + 3 • x = 2 squared + x squared Question 1 options: 5 4 3 2

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Answers (2)
  1. 1 April, 06:21
    0
    Hi Slyther,

    Answer - B. 4

    8 + 3 * x = 2^2 + x^2

    8 + 3 x 4 = 2^2 + 4^2

    8 + 12 = 4 + 16

    20 = 20
  2. 1 April, 06:44
    0
    8 + 3 * X = 2^2 + X^2

    Simplify:

    8 + 3x = 4 + x^2

    Subtract x^2 from each side:

    8 + 3x - x^2 = 4

    subtract 4 from each side:

    8 + 3x - x^2 - 4 = 0

    Simplify:

    3x - x^2 + 4 = 0

    Factor

    - (x-4) (x+1) = 0

    X = 4, - 1

    The answer would be 4.
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