Find the value of k if x = 2 is a zero of the polynomial p(x) = x² + kx - 2
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Answered by
1
Answer:
p(x) = x²+ kx - 2
0 = (2)²+ k×2 -2
0 = 4 + 2k - 2
0 = 2 +2k
-2 = 2k
-2/2 = k
-1 = K
Answered by
1
Answer:
p(2) = (2)^2 + k (2) -2
= 4 + 2k -2
=> 2k = -4+2
=> 2k = -2
=> k = -2 /2
therefore -1 ans
check it
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