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    Domain and range

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    -x^2-20x-3
    What are the domain and range and x intercepts of the function. Approximate to two decimal places

    © BrainMass Inc. brainmass.com March 4, 2021, 6:00 pm ad1c9bdddf
    https://brainmass.com/math/algebra/domain-and-range-22717

    Solution Preview

    f(x)=-x^2-20x-3.
    Then a=-1<0, b=-20, c=-3.
    (1) The domain of f is all real numbers.
    (2) To find the range of f, we need to find its vertex.
    ...

    Solution Summary

    This shows how to find domain, range, and intercepts.

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