Set 2: Quadratic Equations (Beginner)

[Variation 1] **Choice B is the best answer.** Take square root: x - 4 = ±3. x = 4 + 3 = 7 or x = 4 - 3 = 1

Explanation

Answer: B

PROBLEM

Recent studies show that solve: (x - 4) squared = 9. Find the positive solution.

Solve: (x - 4) squared = 9. Find the positive solution.

✓ Correct

Detailed Explanation

[Variation 1] Choice B is the best answer. Take square root: x - 4 = ±3. x = 4 + 3 = 7 or x = 4 - 3 = 1

Why others are wrong:

A: 6 is incorrect because it does not satisfy the equation.

C: 14 is incorrect because it does not satisfy the equation.

D: 8 is incorrect because it does not satisfy the equation.