−2y^2−6y+7=0

Question

step 2 of 2 : Use the discriminant, b2−4ac, to determine the number of solutions of the given quadratic equation. Then solve the quadratic equation using the formula y=−b±sqrt(b2−4ac)/√2a.

Answer 1

ok. how does the discriminant tell you about the roots? In other words, why is it called the discriminant?