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23 April, 00:25

Quadratic formula 9x²-6x-11=0

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Answers (1)
  1. 23 April, 00:34
    0
    9x² - 6x - 11 = 0

    x = - (-6) + / - √ ((-6) ² - 4 (9) (-11))

    2 (9)

    x = 6 + / - √ (36 + 396)

    18

    x = 6 + / - √ (432)

    18

    x = 6 + / - 20.785

    18

    x = 6 + 20.785 ∨ x = 6 - 20.785

    18 18

    x = 26.785 ∨ x = - 14.785

    18 18

    x = 1.488056 ∨ x = - 0.821389
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