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14 June, 06:31

If (x+5) is a factor of 3x^2+14x+k, what is the value of k?

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  1. 14 June, 08:29
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    If (x+5) is a factor the equation will equal zero when x=-5 so

    3 (-5^2) + 14 (-5) + k=0

    75-70+k=0

    5+k=0

    k=-5
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