If a polynomial function f(x) has roots 3 and square root of 7, what must also be a root of f(x)

Question

If a polynomial function f(x) has roots 3 and square root of 7, what must also be a root of f(x)

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Katherine 2 weeks 2021-09-10T12:21:26+00:00 2 Answers 0

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    0
    2021-09-10T12:22:34+00:00

    Answer:

    -√7 = -2.64

    Step-by-step explanation:

    The polynomial function has roots. The first root is 3 and the second is √7.

    When we have a square root that means that we get two roots from the same number but one is negative and the other is positive. For example, if we have:

    √x² = ±x

    Because we can have:

    (-x)² = x², or

    (x)²=x².

    So a square root always gives us two answers, one negative and the other positive.

    0
    2021-09-10T12:22:37+00:00

    Answer:

    x = – \sqrt{7}

    Step-by-step explanation:

    Radical roots occur in pairs, that is

    x = \sqrt{7} is a root then so is x = – \sqrt{7}

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