For what value of k,is -2 a zero of polynomial
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SOLUTION :
Given polynomial, p(x) = 3x² + 4x + 2k and -2 is a zero of p(x).
Since, x = -2 is a zero of polynomial p(x) = 3x² + 4x + 2k
Therefore, p(-2) = 0
p(x) = 3x² + 4x + 2k
3(-2)² + 4(-2) + 2k = 0
3 × 4 - 8 + 2k = 0
12 - 8 + 2k = 0
4 + 2k = 0
2k = 0 - 4
2k = - 4
k = - 4 /2
k = -2
Hence, the value of k is - 2.
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put x =-2 and hence we have the ans of k
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