X b b 2 4 a c 2 a To use the Quadratic Formula we substitute the values of a b and c from the standard form into the expression on the right side of the formula. Quadratic Equation in Standard Form. You can calculate the discriminant b2 - 4ac.
Zero there is one real solution.
You can calculate the discriminant b2 - 4ac. Use the Quadratic Formula to solve x2 4x 8 0 The Quadratic Formula requires that I have the quadratic expression on one side of the equals sign with zero on the other side. By using this website you agree to our Cookie Policy. You can use this formula to solve quadratic equations.