Algebra-1

Question Analysis
This question tests the student's ability to multiply binomials and then sum the coefficients, which requires a deeper understanding of the FOIL method and algebraic manipulation.

Key Concept Explanation
The FOIL method (First, Outer, Inner, Last) is used to expand the product of two binomials. After expanding, the coefficients are summed to find the final value.

Step-by-step Solution
1. Apply the FOIL method to the expression :
First:
Outer:
Inner:
Last:
2. Combine like terms:

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