Algebra-1

Question Analysis
This question tests the student's ability to complete the square for a quadratic equation and identify the value that completes the perfect square trinomial.

Key Concept Explanation
Completing the square involves transforming a quadratic equation into a perfect square trinomial, which can then be solved by taking the square root.

Step-by-step Solution
1. Start with the equation .
2. Move the constant term to the right side: .
3. To complete the square, add to both sides:

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