Differences in linear and quadratic equations

linear equation has two variables doesn't involve any power

quadratic equation involves one of the variables raised to the second power.

Step-by-step explanation:

A linear equation in two variables doesn't involve any power higher than one for either variable. It has the general form Ax + By + C = 0, where A, B and C are constants ... A quadratic equation, on the other hand, involves one of the variables raised to the second power.