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6 September, 19:11

Solve by completing the square with working out

-6x-x^2-8

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  1. 6 September, 20:00
    0
    x = - 3 + / - sqrt (17)

    Step-by-step explanation:

    -6x - (x^2) - 8 = 0

    - ((x^2) + 6x + 8) = 0

    (x^2) + 6x + 8 = 0

    (x + 3) ^2 - 1 = 0

    (x + 3) ^2 = 1

    x + 3 = + / - sqrt (1)

    x + 3 = + / - 1

    x = - 3 + / - 1

    x = - 4, - 2
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