Math

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Solve the equation by factoring, by finding square roots, or by using the quadratic formula.

3(x+4)^2= -27

  • Math -

    3 ( x + 4 ) ^ 2 = - 27 Divide both sides with 3

    ( x + 4 ) ^ 2 = - 9

    The left hand side is a perfect square,so you can apply the square root method :

    x + 4 = + OR - sqrt ( - 9 )

    x = + OR - sqrt ( - 9 )- 4

    ( Remark:

    sqrt ( - 9 ) = sqrt ( - 1 * 3 ^ 2 ) =
    + OR - 3i

    where i = Imaginary unit = sqrt ( - 1 )
    )

    x = + OR - ( 3 i ) - 4

  • Math -

    post it.

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