# How do you solve #9r^2-3=-152#?

##### 1 Answer

Mar 29, 2017

No real root

But…

#### Explanation:

Add

Now, take the square root:

Wait… What is the square root of a negative number? It can't be negative since the square of a negative is positive. Thus, there are no real roots to this equation!

Well… We can define that the square root of negative one to be some number. Mathematicians call it imaginary and symbolize it with