How many solutions are in the solution set for the equation 2x^2 = 20

To solve the equation \( 2x^2 = 20 \), we can start by simplifying it.

1. Divide both sides by 2:
\[
x^2 = 10
\]

2. Next, take the square root of both sides:
\[
x = \pm\sqrt{10}
\]

This indicates that there are two solutions: \( x = \sqrt{10} \) and \( x = -\sqrt{10} \).

So the number of solutions in the solution set is **two**.

The answer is **A. Two**.