Solve for x: x² - 2x - 24 = 0
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: B. x = 6 or x = -4.
- A. x = 6 or x = -3
Why not A: “x = 6 or x = -3” is not x = 6 or x = -4.
- B. x = 6 or x = -4 ✓
- C. x = -6 or x = 4
Why not C: “x = -6 or x = 4” is not x = 6 or x = -4.
- D. x = 7 or x = -5
Why not D: “x = 7 or x = -5” is not x = 6 or x = -4.
Correct answer
B. x = 6 or x = -4
Explanation
x = 6 or x = -4 (option B) is the accepted answer to “Solve for x: x² - 2x - 24 = 0”. Option A (x = 6 or x = -3) is a different value from x = 6 or x = -4. Option C (x = -6 or x = 4) is a different value from x = 6 or x = -4. Option D (x = 7 or x = -5) is a different value from x = 6 or x = -4. Keep x = 6 or x = -4 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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