10
Answer: DSet 2: Quadratic Equations (Beginner)
Explanation
PROBLEM
Solve: (x - 4) squared = 1. Find the positive solution.
Solve: (x - 4) squared = 1. Find the positive solution.
A.
10
B.
4
C.
3
D.✓ Correct
5
Detailed Explanation
Choice D is the best answer. Take square root: x - 4 = ±1. x = 4 + 1 = 5 or x = 4 - 1 = 3
Why others are wrong:
A: 10 is incorrect because it does not satisfy the equation.
B: 4 is incorrect because it does not satisfy the equation.
C: 3 is incorrect because it does not satisfy the equation.
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