Set 1: Quadratic Equations (Beginner)

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

Explanation

Answer: A

PROBLEM

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

✓ Correct

Detailed Explanation

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

Why others are wrong:

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

C: 5 is incorrect because it does not satisfy the equation.

D: 9 is incorrect because it does not satisfy the equation.