Algebra-1

Question Analysis
This question tests the student's ability to solve a quadratic equation by completing the square when all three coefficients are non-zero.

Key Concept Explanation
Completing the square involves transforming the quadratic equation into the form by rearranging terms and adding a constant to both sides.

Step-by-step Solution
1. Divide the equation by 7: .
2. Rewrite the left side as a perfect square:

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