Question

x=-2 is a zero of polynomial 3x^3+kx+5 find K​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$if \: \: x = - 2 \: \: is \: \: a \: \: zero \: \: of \: \: polynomial \: \: then = > \\ \\ 3 {( - 2)}^{3} + k( - 2) + 5 = 0 \\ \\ 3 \times ( - 8) - 2k + 5 = 0 \\ \\ - 2k - 24 + 5 = 0 \\ \\ - 2k = 19 \\ \\ k = - \frac{19}{2}$