Summary: Review Key Concepts Completing the square may be used to rewrite an expression in the form a(x2+bx)a(x^2+bx)a(x2+bx) as a perfect square trinomial of form a(x+b)2+ca(x+b)^2+ca(x+b)2+c Glossary Perfect square trinoial a trinomial of form x2+2bx+b2x^2 + 2bx +b^2x2+2bx+b2 that factors into (x+b)2(x+b)^2(x+b)2 Licenses & AttributionsCC licensed content, OriginalRevision and Adaptation. Provided by: Lumen Learning License: CC BY: Attribution.