Algebra Help - Calculators, Lessons, and Worksheets - Wyzant ... Combining Like Terms Lessons. Combining Like Terms and Solving Worksheet; Completing the Square Lessons. Solve By Completing the Square Worksheet; Complex Numbers; Conic Sections; Factor Theorem; Factoring A Difference Between Two Squares Lessons. Factoring a Difference Between Two Squares Worksheet; Factoring A GCF From an Expression Lesson