Answer:
Step-by-step 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)
