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9 April, 20:41

If f (x) = x^2-81 and g (x) = (x-9) ^-1 (x+9) find g (x) x f (x)

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  1. 9 April, 21:08
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    F (x) = x^2-81

    g (x) = ((x-9) ^-1) (x+9)

    f (x) * (g (x))

    (x^2-81) ((x+9) / (x-9))

    ((x+9) (x-9)) ((x+9) / (x-9))

    (x+9) (x+9)

    x^2+9x+9x+81

    x^2+18x+81
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