Algebra-1

Question Analysis
This question tests the student's ability to multiply polynomials with multiple terms, specifically a trinomial by a trinomial. The focus is on applying the distributive property and combining like terms.

Key Concept Explanation
To multiply polynomials, each term in the first polynomial must be multiplied by each term in the second polynomial. After multiplying, combine like terms to simplify the expression.

Step-by-step Solution
1. Distribute each term in the first polynomial to each term in the second polynomial:

2. Perform the multiplications:
3. Combine like terms: