# Quadratic Equation

Quadratic Equation is an equation which contains an `x^2` term (or if you want to get technical it is an equation containing a single variable of degree^{2} with no higher power).

A **quad** bike with a **rat** (quadratic) driving, pulling an **X-**ray (X) of a fish in a **square** (^{2}) fish tank.

**Example 1**

A quadratic equation is an equation which contains a `x^2` term.

`y=x^2`

`y=x^2+2`

`y=x^2+x-4`

`y=x^2+2x-6`

All of the equations contain a `x^2` term therefore they are called quadratic equations.

**Example 2**

`ax^2+bx+c=0`

This is a well known quadratic equation i.e. containing `x^2`

**Example 3**

`x^2+y^2=z^2`

`x^3+x^2=0`

These are NOT quadratics because the first has another variable with degree squared and the second has one with a higher power than 2.