Quadratic equations don't always look like quadratic equations. On this page we'll discuss several examples of equations that can be converted to a quadratic equation, despite initial appearances.
Whenever you solve an equation, remember to check your answers by substituting them in the originals equation. I'll assume you'll do that and won't mention it specifically in these examples.
Example 2. Changing the Variable. The equation
Example 3. More on changing the variable. The equation