2
Answer: CSet 4: Quadratic Equations (Beginner)
Explanation
PROBLEM
Solve: (x - 7) squared = 25. Find the positive solution.
Solve: (x - 7) squared = 25. Find the positive solution.
A.
14
B.
11
C.✓ Correct
12
D.
13
Detailed Explanation
Choice C is the best answer. Take square root: x - 7 = ±5. x = 7 + 5 = 12 or x = 7 - 5 = 2
Why others are wrong:
A: 14 is incorrect because it does not satisfy the equation.
B: 11 is incorrect because it does not satisfy the equation.
D: 13 is incorrect because it does not satisfy the equation.