Solve for x: x² + 5x - 24 = 0
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: B. x = 3 or x = -8.
- A. x = 4 or x = -9
Why not A: “x = 4 or x = -9” is not x = 3 or x = -8.
- B. x = 3 or x = -8 ✓
- C. x = -3 or x = 8
Why not C: “x = -3 or x = 8” is not x = 3 or x = -8.
- D. x = 3 or x = -7
Why not D: “x = 3 or x = -7” is not x = 3 or x = -8.
Correct answer
B. x = 3 or x = -8
Explanation
x = 3 or x = -8 (option B) is the accepted answer to “Solve for x: x² + 5x - 24 = 0”. Option A (x = 4 or x = -9) is a different value from x = 3 or x = -8. Option C (x = -3 or x = 8) is a different value from x = 3 or x = -8. Option D (x = 3 or x = -7) is a different value from x = 3 or x = -8. Keep x = 3 or x = -8 as the ACT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, Algebra, American Exams, ACT
Submitted by: MCQsHub Editorial
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