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Factoring x² + 7x + 12 = 0 by inspection gives roots
A3 and 4
B−1 and −12
C−2 and −6
D−3 and −4
Answer & Solution
Correct answer: D. −3 and −4
Two numbers with sum 7 and product 12 are 3 and 4, so the factors give roots −3 and −4.
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