The value under the square root symbol in the formula is called the discriminant. I have to show that E has exactly three points of order 2 if discriminant A2−4 is quadratic residue.Zk = 43n r for all k. 67. The purpose of this unit is to further students' understanding of relationships between two variable quantities. The discriminant won't tell you what the roots or Solutions of your quadratic equation are but they will tell you what kind of roots they are. The discriminate formula is b squared minus four ac for quadratic equation in standard form ax squared plus bx plus c. The formula derives from the quadratic formula. Identify the coefficients a, b, and c for each equation.