Algebramedium · Past Paper
Which value of k makes x^2 + kx + 16 a perfect square?
A4
B8
C16
D32
✓ Correct Answer: B — 8
For x^2 + kx + 16, k = 2 * sqrt(16) = 8 (or -8).
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✓ Correct Answer: B — 8
For x^2 + kx + 16, k = 2 * sqrt(16) = 8 (or -8).
Share this question