Solve for x: x² + 0x - 4 = 0
Difficulty: Medium
About this MCQ
Medium ACT item. Correct choice: C. x = 2 or x = -2.
- A. x = 2 or x = -1
Why not A: “x = 2 or x = -1” is not x = 2 or x = -2.
- B. x = 3 or x = -3
Why not B: “x = 3 or x = -3” is not x = 2 or x = -2.
- C. x = 2 or x = -2 ✓
- D. x = -2 or x = 2
Why not D: “x = -2 or x = 2” is not x = 2 or x = -2.
Correct answer
C. x = 2 or x = -2
Explanation
x = 2 or x = -2 (option C) is the accepted answer to “Solve for x: x² + 0x - 4 = 0”. Option A (x = 2 or x = -1) is a different value from x = 2 or x = -2. Option B (x = 3 or x = -3) is a different value from x = 2 or x = -2. Option D (x = -2 or x = 2) is a different value from x = 2 or x = -2. Keep x = 2 or x = -2 as the ACT fact for this stem.
Source: Original practice question, MCQsHub
Tags: Math, Algebra, American Exams, ACT
Submitted by: MCQsHub Editorial
Related MCQs
- A rectangular prism has a length of 12, width of 4, and height of 11. What is its volume?
- What is the distance between the points (2, -6) and (-1, -10)?
- A jar contains only red and blue marbles in a ratio of 7:4. If there are 8 blue marbles, how many red marbles...
- If 8x + 3 = 27, what is the value of x?
- A triangle has a base of 18 and a height of 20. What is its area?
- If f(x) = 2x + 6, what is f(4)?