An equation in which the coefficient and the constant terms are represented by letters.

General equations or standard equations and other parametric equations are examples of literal equations.

### Example

The literal equation \({x^2}\) + *px* + *q* = 0 has the roots :

\(x_{1} = \dfrac{-p + \sqrt{{p}^{2} − 4q}}{2}\) and \(x_{2} = \dfrac{-p − \sqrt{{p}^{2} − 4q}}{2}\)