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27 September, 19:33

Solve by the quadratic formula:

-x squared + 16=6x + 1

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Answers (1)
  1. 27 September, 19:55
    0
    x = - 3 ± 2√6

    Step-by-step explanation:

    -x² + 16 = 6x + 1

    0 = x² + 6x - 15

    Quadratic formula:

    x = [ - b ± √ (b² - 4ac) ] / 2a

    x = [ - 6 ± √ (6² - 4 (1) (-15)) ] / 2 (1)

    x = [ - 6 ± √ (36 + 60) ] / 2

    x = (-6 ± √96) / 2

    x = (-6 ± 4√6) / 2

    x = - 3 ± 2√6
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