## Key Concepts

- Completing the square may be used to rewrite an expression in the form [latex]a(x^2+bx)[/latex] as a perfect square trinomial of form [latex]a(x+b)^2+c[/latex]

## Glossary

**Perfect square trinoial**- a trinomial of form [latex]x^2 + 2bx +b^2[/latex] that factors into [latex](x+b)^2[/latex]