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19 February, 06:35

What is x2-4x=2x+24 equal to 0

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  1. 19 February, 10:06
    0
    Make equal to zero

    x^2-4x=2x+24

    minus 2x both sides

    x^2-4x-2x=24

    minus 24

    x^2-6x-24=0

    comlpete the square

    isolate x^2 and x term

    (x^2-6x) - 24=0

    take 1/2 of - 6 and square it (-6/2=-3 (-3) ^2=9) and add to both sides inside parethaes

    (x^2-6x+9) - 24=9

    factor perfect square

    (x-3) ^2-24=9

    add 24 both sides

    (x-3) ^2=33

    sqrt both sides

    x-3=+/-√33

    add 3 to both sides

    x=3+/-√33

    x=3+√33 or 3-√33
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