X b b 2 4 a c 2 a. D b b - 4 a c. Make sure that a 1 if a 1 multiply through the equation by before proceeding.
A v 2 and a - v 2.
X b b 2 4 a c 2 a. Ax 2 bx c 0 where a b and c are real numbers and a 0 The term b 2-4ac is known as the discriminant of a quadratic equation. If bb 4ac then roots are complex not real. By the Fundamental Theorem of Algebra a quadratic equation has two roots.