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3 March, 10:34

Select the two values of the x that are roots of the given polynomial below. 3x^2+20x-7

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  1. 3 March, 11:00
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    3x² + 20x - 7 =

    3x² + 21x - x - 7 =

    3x (x+7) - (x+7) =

    (3x-1) (x+7)

    3x-1 = 0 or x+7 = 0

    x = - 1/3 x=-7

    Answer: - 7, - 1/3.
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