Q. 2 D4.0( 4 Votes )

Find that value o

Answer :

When we compare the above quadratic equation with the generalized one we get,

ax2 + bx + c = 0


a = k + 1


b = -2(k – 1)


c = 1


Since the quadratic equations have real and equal roots,


b2 – 4ac = 0 for real and equal roots


(-2(k – 1)) 2 – (4 × (k + 1) × 1) = 0


4(k2 - 2k + 1) – 4k - 4 = 0


4k2 - 8k + 4 – 4k - 4 = 0


4k2 - 12k = 0


4k (k – 3) = 0


(k – 3) = 0 or 4k = 0


k = 3 or k = 0


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