Q23 of 83 Page 90

The discriminate of x2 — 3x — k = 0 is 1. A value of x is

We know,

D = b2 – 4ac


Here, a = 1, b = – 3 and c = – k


⇒ D = (– 3)2 – 4(1)(– k) = 1


⇒ 9 + 4k = 1


⇒ 4k = – 8



⇒ k = – 2


(A) doesn’t match the solution.


(C) doesn’t match the solution.


(D) doesn’t match the solution.

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