Question

Find the value of k for which the quadratic equation 2x^2-kx+k=0 has real and equal roots

Answer 1

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Answer 2

Answer:

Since the roots are real and equal, ∴ D = b

2 − 4ac = 0

⇒k

2 – 4×3×3 = 0 (∵ a = 3, b = k, c = 3)

⇒k

2 = 36

⇒k = 6 or −6