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18 November, 07:42

X^2+12x=-36 solve for x

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Answers (2)
  1. 18 November, 09:05
    0
    x = - 6

    Step-by-step explanation:

    rearrange into standard form : ax² + bx + c = 0 : a ≠ 0

    add 36 to both sides

    x² + 12x + 36 = 0 ← in standard form

    (x + 6) (x + 6) = 0 ← in factored form

    (x + 6) ² = 0, hence

    x + 6 = 0 ⇒ x = - 6
  2. 18 November, 09:40
    0
    x = - 6 (multiplicity 2)

    Step-by-step explanation:

    x^2 + 12x = - 16.

    Rearranging:-

    x^2 + 12x + 36 = 0

    We can factor this. Note + 36 = + 6 * + 6.

    So (x + 6) (x + 6) = 0

    x = - 6 (multiplicity 2).
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