alleryFor what value of k does x² + kx + 16 = 0 have equal roots?
Ak = ±16
Bk = ±8
Ck = 0
Dk = ±4
Answer & Solution
Correct answer: B. k = ±8
Equal roots ⇒ D = 0 ⇒ k² − 64 = 0 ⇒ k² = 64 ⇒ k = ±8.
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