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If 3 is a zero of the polynomial 2x^2+ x + k, find the value of k.

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If 3 is a zero of the polynomial 2x2 + x + k, find the value of k.

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Given: 3 is one of zeroes of the polynomial 2x2 + x + k , which means x = 3 will satisfy it.

2x2 + x + k = 0

2(3)2 + 3 + k = 0

18 + 3+ k = 0

k = -21

The value of k is -21

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