How to solve with factoring a quadratic equation when a=1

The video tutorial explains how to factor a quadratic equation using the diamond method. The instructor sets up the problem, demonstrates the diamond method to find factors, and solves the equation using the zero product property. A mistake is corrected in the final solution, ensuring the correct roots are identified.

Describe the process of rewriting the quadratic equation as a multiplication of two binomials.

What are the roots of the equation X^2 - 2X - 15?