Question

find the value of k if -2is zero of the polynomial 3x²+4x+2K

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Answer 1

Hello friends!!

Here is your answer :

$p(x) = 3 {x}^{2} + 4x + 2k$


$p( - 2) = 0$


$3 {( - 2)}^{2} + 4( - 2) + 2k = 0$


$3 \times 4 + ( - 8) + 2k = 0$


$12 - 8 + 2k = 0$


$4 + 2k = 0$


$2k = - 4$


$k = \frac{ - 4}{2}$


$k = - 2$



Hope it helps you...