If 2 is a zero of the polynomial x^2 – kx + 8, then k =
If 2 is a zero of the polynomial x2 – kx + 8, then k =
A) 1
B) 4
C) 6
D) 3
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Correct option is (C) 6
Given that 2 is a zero of polynomial \(x^2-kx+8.\)
\(\therefore2^2-2k+8=0\)
\(\Rightarrow\) 2k = 4+8 = 12
\(\Rightarrow\) \(k=\frac{12}2=6\)
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