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4 January, 00:36

Find the domain of the rational expression.

f (x) = - 3/x^2-2x-35

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  1. 4 January, 00:57
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    all real numbers except - 5 and 7

    Step-by-step explanation:

    The function ...

    f (x) = - 3 / (x^2-2x-35) = - 3 / ((x+5) (x - 7))

    is undefined where the denominator is zero. The values of x that make the denominator zero are - 5 and + 7, so the domain is all real numbers except those.
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