The name Quadratic comes from quad meaning square because the variable gets squared like x 2. An algebraic equation or polynomial equation with degree 2 is said to be a quadratic equation. When given a quadratic equation in standard form where a b and c are all nonzero determine the value for the discriminant using the formula b2 4ac.
Quadratic Equations are useful in many other areas.
If the discriminant is a perfect square then solve by factoring. Quadratic equations are also needed when studying lenses and curved mirrors. A quadratic equation in mathematics is defined as a polynomial of second degree whose standard form is ax 2 bx c 0 where a b and c are numerical coefficients and a 0. The name Quadratic comes from quad meaning square because the variable gets squared like x 2.