Solve for x: x² - 9x + 18 = 0
Difficulty: Medium
About this MCQ
Medium GMAT item. Correct choice: A. x = 3 or x = 6.
- A. x = 3 or x = 6 ✓
- B. x = 3 or x = 7
Why not B: “x = 3 or x = 7” is not x = 3 or x = 6.
- C. x = -3 or x = -6
Why not C: “x = -3 or x = -6” is not x = 3 or x = 6.
- D. x = 4 or x = 5
Why not D: “x = 4 or x = 5” is not x = 3 or x = 6.
Correct answer
A. x = 3 or x = 6
Explanation
x = 3 or x = 6 (option A) is the accepted answer to “Solve for x: x² - 9x + 18 = 0”. Option B (x = 3 or x = 7) is a different value from x = 3 or x = 6. Option C (x = -3 or x = -6) is a different value from x = 3 or x = 6. Option D (x = 4 or x = 5) is a different value from x = 3 or x = 6. Keep x = 3 or x = 6 as the GMAT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, Algebra, American Exams, GMAT
Submitted by: MCQsHub Editorial
Related MCQs
- If 3 workers can complete a project in 16 days, how many days would it take 6 workers, assuming equal work rat...
- What is 60% of 340?
- If 10 workers can complete a project in 18 days, how many days would it take 10 workers, assuming equal work r...
- If 7x + 19 = -30, what is the value of x?
- If 9x + 14 = 50, what is the value of x?
- Solve for x: x² + 0x - 9 = 0