📊 GMAT Exam Prep

For which of the following inequalities is the solution set given by x < -4 or x > 2?

A x^2 - 2x - 8 > 0
B x^2 + 2x - 8 < 0
C x^2 - 2x - 8 < 0
D x^2 + 2x - 8 > 0

✓ Correct Answer: Option D

The roots of the quadratic are -4 and 2. This means the quadratic factors as (x - (-4))(x - 2) = (x + 4)(x - 2). For the solution x < -4 or x > 2, the inequality must be (x + 4)(x - 2) > 0, which expands to x^2 + 2x - 8 > 0.

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