Algebra-1

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

Key Concept Explanation
Factoring a quadratic equation involves rewriting it as a product of two binomials. The zero-product property states that if the product of two factors is zero, then at least one of the factors must be zero.

Step-by-step Solution
1. For , find two numbers with product and sum 12: 15 and .
2. Rewrite the middle term: .
3. Group and factor: