| completing the square | A method for solving quadratic equations by rewriting one side of the equation as a squared binomial. |
| discriminant | In the Quadratic Formula, the expression underneath the radical symbol: b2 – 4ac. The discriminant can be used to determine the number and type of solutions the formula will reveal. |
| square root property | If x2 = a2, then x = a or x = −a. |