3
Answer: DSet 5: Quadratic Equations (Beginner)
Explanation
PROBLEM
Solve: (x - 6) squared = 9. Find the positive solution.
Solve: (x - 6) squared = 9. Find the positive solution.
A.
10
B.
8
C.
18
D.✓ Correct
9
Detailed Explanation
Choice D is the best answer. Take square root: x - 6 = ±3. x = 6 + 3 = 9 or x = 6 - 3 = 3
Why others are wrong:
A: 10 is incorrect because it does not satisfy the equation.
B: 8 is incorrect because it does not satisfy the equation.
C: 18 is incorrect because it does not satisfy the equation.