Question

If the roots of x²+kx+k+3 = 0 are real and equal, what is the value of k?
(A) -6 or 2 (B) 6 or - 2 (C) 4 or - 2 (D) – 4 or 2
i know the ans is (D) – 4 or 2 but how? explain me plz
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Answer 1

Answer:

-4 or 2

Step-by-step explanation:

x=-b