Question: What is the solution to the inequality: x^2 + 3x - 4 ≤ 0?

Options:

1. (-4, 1)
2. (1, 4)
3. (-1, 4)
4. (-4, -1)

Correct Answer: (-4, 1)

Solution:

Step 1: Factor the quadratic: (x + 4)(x - 1) ≤ 0. Step 2: Critical points are x = -4 and x = 1. Step 3: Test intervals: (-∞, -4), (-4, 1), (1, ∞). The solution set is [-4, 1].