Answer:
Explanation:
Factor numerator: x^2 + x - 12 = (x + 4)(x - 3)
Factor denominator: x^2 + 7x + 12 = (x + 3)(x + 4)
Notice that the numerator and denominator have a common factor (x + 4).
They can cancel.
What is left is (x - 3)/(x + 3)
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