Question

Find the value of k for which 3 is a zero of polynomial 2x2 + x + k.​

Answer 1

Let, p(x)= 2×2 + x + k

And, since 3 is the zero of thepolynomial p(x), thus taking the value of x = -3 inthe given polynomial.

Therefore, p(x) => 2×2 + (-3) + k = 0

=> 4 - 3 + k = 0

=> 1 + k = 0

=> k = -1

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