3
Answer: DSet 3: Quadratic Equations (Beginner)
Explanation
PROBLEM
Solve: (x - 3) squared = 9. Find the positive solution.
Solve: (x - 3) squared = 9. Find the positive solution.
A.
7
B.
4
C.
8
D.✓ Correct
6
Detailed Explanation
Choice D is the best answer. Take square root: x - 3 = ±3. x = 3 + 3 = 6 or x = 3 - 3 = 0
Why others are wrong:
A: 7 is incorrect because it does not satisfy the equation.
B: 4 is incorrect because it does not satisfy the equation.
C: 8 is incorrect because it does not satisfy the equation.