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16 January, 07:05

For what values of fxis * x ^ 2 - 36 = 5x true?

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Answers (2)
  1. 16 January, 07:31
    0
    Step-by-step explanation:

    x ² - 36 = 5x

    x²-5x-36=0

    a=1 b = - 5 c=-36

    calculate the discriminent b²-4ac ... continu
  2. 16 January, 07:33
    0
    x = - 4, x = 9

    Step-by-step explanation:

    Given

    x² - 36 = 5x (subtract 5x from both sides)

    x² - 5x - 36 = 0 ← in standard form

    Consider the factors of the constant term ( - 36) which sum to give the coefficient of the x - term ( - 5)

    The factors are - 9 and + 4, since

    - 9 * 4 = - 36 and - 9 + 4 = - 5, thus

    (x - 9) (x + 4) = 0

    Equate each factor to zero and solve for x

    x + 4 = 0 ⇒ x = - 4

    x - 9 = 0 ⇒ x = 9
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