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29 May, 08:25

Solve the equation

9x² - 29x - 28 = 0

Give your answers to 2 decimal places when appropriate

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Answers (1)
  1. 29 May, 08:53
    0
    x = 4 or x = 0.78

    Step-by-step explanation:

    9x² - 29x - 28 = 0

    2 roots: x = (( - (-29) ± √ (-29) ² - 4 x 9 x (-28)) / (2 x 9)

    = (29 ± √841 + 1008) / 18

    = (29 ± 43) / 18

    x = 72 / 18 = 4 or

    x = - 14 / 18 = - 0.78
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