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Completing the square on x² + 6x + 5 = 0 gives which roots?
A1 and 5
B1 and −5
C−3 and 2
D−1 and −5
Answer & Solution
Correct answer: D. −1 and −5
x² + 6x + 5 = (x + 3)² − 4, so x + 3 = ±2 and x = −1 or −5.
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