Algebra-1

Question Analysis
This question tests the student's ability to multiply two binomials using the FOIL method, simplify the resulting polynomial, and then find the sum of the coefficients.

Key Concept Explanation
The FOIL method (First, Outer, Inner, Last) is used to multiply two binomials. After applying the method, like terms are combined to simplify the expression. The sum of the coefficients is then calculated.

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

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