# Calculating Square Roots with a TI-30 XS Calculator

In this lesson, part of our free online GED® classes, we’ll look at how to calculate square roots and squares of numbers with the GED calculator TI-30 XS.

For success on the GED Math section, following online GED classes is a perfect tool, especially for students living in remote areas and those with busy lives and schedules.

A square number is a number multiplied by itself.

Let’s see how to use our calculator for this kind of task.

Look at the keyboard of your calculator and find the button that looks like this.

It says x to the power of 2.

It’s a primary key and we don’t need to use the second key.

Now, let’s answer this question:

How much is 18 to the power of 2?

Option A: 324.

Option B: 136. Let’s calculate it.

Press 18, then press the key with sign x to the power of two. Click enter.

Our screen shows that 18 to the power of 2 equals 324,

Option A is correct.

Step-By-Step Explanation

## Calculating Square Roots

The opposite of squaring a number is called finding the square root.
We can use our calculator to find the square roots easily.

Look at the keyboard of your calculator and find the sign that looks like this.

It is above the key that says x to the power of 2. So, to activate the function of finding the square root, first, we need to press the second key.

Step-By-Step Explanation

1. What is $$\sqrt{121}$$
A.
B.
C.

Question 1 of 3

2. Compute $$\sqrt{289}$$.
A.
B.
C.

Question 2 of 3

3. Compute the exact value of the given expression.

$$\sqrt{3}^{2} + 4^{2}$$
A.
B.
C.

Question 3 of 3

Next Lesson: Calculating Exponents with TI-30 XS

Now, let’s answer this question: What is the square root of 361?

Option A: 26,
or Option B: 19.

Let’s calculate it.

Press the second key, then press this sign. Now, press 361 and click enter.

Our screen shows that the square root of 361 is 19.

Option B is correct.

So this was our free lesson about calculating square roots and squares of numbers as part of the free TI-30 XS Calculator Series of our free online GED classes.

Click on the link above to continue with the next free calculator lesson that addresses Calculating Exponents with the TI-30 XS. Check also our other free online GED classes that address the four academic fields included in the GED exam: Science, Social Studies, Language Arts, and Math.

Last Updated on April 6, 2021.