This document provides instructions for factoring quadratic trinomials. It defines quadratic trinomials as expressions of the form ax^2 + bx + c, where a, b, and c are real numbers and a is not equal to 0. It then presents the steps to factor quadratic trinomials where a=1: 1) factor the first term, 2) factor the last term such that the sum of the factors equals the coefficient of the middle term, and 3) write the expression as a product of two binomials. Several examples demonstrating these steps are shown. Factors are checked using the FOIL method. Finally, factors are provided for three additional quadratic trinomials.