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19 January, 16:15

Order the steps to solve the equation log (x^2-15) = log (2x) form 1 to 5

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  1. 19 January, 17:47
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    Answer:x=-5 and x=3

    Step-by-step explanation:

    log (x^2-15) = log (2x)

    Cancel log at both sides we get

    x^2-15=2x

    Collect like terms

    x^2-2x-15=0

    x^2-3x+5x-15=0

    x (x-3) + 5 (x-3) = 0

    (x+5) (x-3) = 0

    x+5=0 x-3=0

    x=-5 x=3
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