find the roots of polynomial x2-3x-28and verify the relationship between the zeros and cofficients​

Question

find the roots of polynomial x2-3x-28and verify the relationship between the zeros and cofficients​

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Elliana 13 hours 2021-11-25T10:49:36+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-11-25T10:50:44+00:00

    ANSWER

    x

    2

    −3x−28=0

    x

    2

    −7x+4x−28=0

    x(x−7)+4(x−7)=0

    (x+4)(x−7)=0

    ∴x=−4,7

    sumofroots=−4+7=3

    productofroots=−4×7=−28

    0
    2021-11-25T10:51:27+00:00

    x^2-3x-28
    x^2-7x+4x-28
    x(x-7)+4(x-7)
    (x-7)(x+4)
    x=7 or x=-4

    Sorry I do not know what the rest of the question means

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