If 3 is zero of the polynomial x^2 + 2x – a, then “a” is
If 3 is zero of the polynomial x2 + 2x – a, then “a” is
A) -3
B) -15
C) 15
D) 3
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Correct option is (C) 15
Given that 3 is a zero of polynomial \(x^2+2x-a.\)
\(\therefore3^2+2\times3-a=0\)
\(\Rightarrow\) a = 9+6 = 15
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