Question

for what value of k, 3 is a zero of polynomial 2 X ^2 + X + k

Answer 1

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Answer 2

P(x) = 2x²+x+k
since, 3 is the zero of the polynomial then, p(3) = 0
P(3) = 2(3)²+(3)+k
0 = 18+3+k
0 = 21+k
k = -21
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