Algebra-1

Question Analysis
This question tests the student's ability to identify the coefficient of the linear term in the expansion of a binomial squared (addition).

Key Concept Explanation
The expansion of a binomial squared (addition) involves squaring each term and adding twice the product of the two terms. The linear term is the middle term in the expansion.

Step-by-step Solution
1. Identify the terms: and
2. Apply the formula:

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