9
Answer: BSet 5: Quadratic Equations (Beginner)
Explanation
PROBLEM
Recent studies show that solve: (x - 6) squared = 4. Find the positive solution.
Solve: (x - 6) squared = 4. Find the positive solution.
A.
7
B.✓ Correct
8
C.
9
D.
16
Detailed Explanation
[Variation 1] Choice B is the best answer. Take square root: x - 6 = ±2. x = 6 + 2 = 8 or x = 6 - 2 = 4
Why others are wrong:
A: 7 is incorrect because it does not satisfy the equation.
C: 9 is incorrect because it does not satisfy the equation.
D: 16 is incorrect because it does not satisfy the equation.