Question

If one of the zeroes of the quadratic polynomial (k-1)x2 +kx-1 is -3, then the value of k is

Answer 1

Answer:

16x2−40x+2k−1=0

For equal & real roots, D=0

D=(40)2−4(16)(2k−1)=0

⇒24(k−1)=16(40)2

⇒k−1=50

⇒k=51