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Question

Question 1
If one of the zeroes of the quadratic polynomial (k1)x2+kx+1 is -3, then the value of k is
(A)43
(B)43
(C)23
(D)23

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Solution

Given that, one of the zeroes of the quadratic polynomial say p(x)=(k1)x2+kx+1, is3. then p(3)=0
(k1)(3)2+k(3)+1=0
9(k1)3k+1=0
9k93k+1=0
6k8=0
k=43

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