alleryThe roots of x² − x − 12 = 0 are:
A3 and 4
B−3 and 4
C−3 and −4
D3 and −4
Answer & Solution
Correct answer: B. −3 and 4
Need product −12 and sum −1: numbers are −4 and 3. Factor: (x − 4)(x + 3) = 0. Roots: x = 4 and x = −3.
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