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For what value of k does p(x) = x² + kx + 9 have equal zeroes?

Ak = ±6
Bk = ±3
Ck = ±9
Dk = 0
Answer & Solution
Correct answer: A. k = ±6
Equal zeroes ⇒ D = 0 ⇒ k² − 36 = 0 ⇒ k = ±6.
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