An equation which involves differential coefficient is called a differential equation.

### Order and Degree of a differential equation

- The order of a differential equation is the order of the highest differential coefficient present in the equation.
- The degree of a differential equation is the degree of the highest derivative after removing the radical sign and fraction.

### Formation of a differential Equation

The differential equation can be formed by differentiating the ordinary equation and eliminating the arbitrary constants.

### Solution of a differential equation

An equation containing dependent variable (y) and independent variable (x) and free from derivative, which satisfies the differential equation, is called the solution of the differential equation.