How to Use The Square Root Function on Computer Calculator

Calculating square roots is a fundamental mathematical operation with applications in geometry, algebra, and statistics. This guide explains how to use the square root function on your computer calculator, including step-by-step instructions and practical examples.

Locating the Square Root Function

The location of the square root function varies slightly between calculator models, but it's typically found in one of these places:

On the main number pad, often labeled with a √ symbol
In the function menu (often labeled as "Math" or "Functions")
As a secondary function (often accessed by pressing a shift or function key)

Most modern computer calculators use the √ symbol to represent the square root function. If you don't see this symbol, check the function menu or consult your calculator's manual.

Using the Square Root Function

Once you've located the square root function, using it is straightforward:

Enter the number you want to find the square root of
Press the √ (square root) button
The calculator will display the square root of your number

√a = b where b² = a

For example, to find the square root of 25:

Press the "2" and "5" buttons
Press the √ button
The calculator will display "5" as the result

Some calculators require you to press the "=" button after entering the number and selecting the square root function. If your calculator doesn't automatically display the result, try pressing "=" to see the answer.

Common Uses of Square Root

The square root function has several practical applications:

Finding the side length of a square when you know the area
Calculating distances in coordinate geometry
Determining standard deviations in statistics
Solving quadratic equations

Square Root Examples
Number	Square Root	Verification
16	4	4 × 4 = 16
25	5	5 × 5 = 25
36	6	6 × 6 = 36
49	7	7 × 7 = 49

Troubleshooting

If you're having trouble using the square root function, try these solutions:

Check that your calculator is in the correct mode (usually "Math" or "Scientific")
Ensure you're not in a different function mode (like "Statistics" or "Programming")
Look for a secondary function key (often labeled "2nd F" or "Shift") that might be required to access the square root function
Consult your calculator's manual or online documentation

If you're using a graphing calculator, the square root function might be located in the "Math" menu under "Square Root" or "√".

Frequently Asked Questions

Where is the square root button on my calculator?

The square root button is typically labeled with a √ symbol. It's usually found on the main number pad or in the function menu. If you can't find it, check the manual or consult the calculator's documentation.

Can I find square roots of negative numbers?

On most standard calculators, you cannot find square roots of negative numbers because the result would be an imaginary number (involving √-1). For complex numbers, you would need a more advanced calculator.

What if my calculator doesn't show the square root symbol?

If your calculator doesn't display the √ symbol, it might be represented by a different symbol or located in a function menu. Check the calculator's documentation or try pressing function keys to access hidden functions.

How do I calculate the square root of a fraction?

To find the square root of a fraction, you can either: 1) Find the square root of the numerator and denominator separately, or 2) Convert the fraction to a decimal first, then find the square root. Most calculators will handle this automatically if you enter the fraction properly.