There is also a formula that can be used to solve cubic equations, where you see a term with x to the 3rd power. However, the formula is quite complex, so it's more common to solve cubic equations using other methods.

Solve interactive math questions related to the video "What Happens When The Discriminant is 0?".

When you work with quadratic equations, the discriminant is what is under the square root when you use the quadratic formula

An equation that can be written in the form 

where the coefficient a is not equal to 0

The number in front of a variable or product of variables, showing how many you have of that variable or product of variables