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Question

Find k if x² + kx + 16 = 0 has equal roots.

Answer: Equal roots ⇒ D=0 ⇒ k²−64=0 ⇒ k=±8.

Question

Find k if x² + kx + 16 = 0 has equal roots.

Answer: Equal roots ⇒ D=0 ⇒ k²−64=0 ⇒ k=±8.