Solve the quadratic inequality (x - 2)(x + 1) ≤ 0.
Correct answer: B. -1 ≤ x ≤ 2
- A. x ≤ -1 or x ≥ 2
- B. -1 ≤ x ≤ 2
- C. x < -1 or x > 2
- D. -2 ≤ x ≤ 1
Explanation
The critical values are -1 and 2. The product is non-positive between the roots, including the roots, so the solution is -1 ≤ x ≤ 2.
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