Answer:
Two
Step-by-step explanation:
When you solving square equation, you will have two solutions.
Here we are given 
We have to solve for x.
Divide both sides by a, we get

Simplifying, we get

In order to find the value of x, we need to get rid of square on the left side, so we need to take the square root on both sides, we get

x = ±
So you will have a positive number and a negative number.
Therefore, there are two solutions.