Question

(i) If the roots of x2 + k + k=0 are real and equal, what is the value of k?
(A) 0 (B) 4 (C) 0 or 4 (D) 2
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Answer 1

Step-by-step explanation:

Given x

2+kx+k

roots are real & equal

∴b2

−4ac=0=(k)

2

−4(1)(k)=0

=

2

−4k=0

=k(k−4)=0

∴ k = 0 or k = 4