# Square root

This tool calculates the square root of a real number A.

## Understanding and Calculating Square Roots

The square root of a number is another number that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 x 3 = 9. The square root is often represented by the symbol √.

How to calculate a square root:

1. Using a calculator: This is the quickest and most accurate way. Simply enter the number and press the square root button.
2. Manual extraction method: Although rarely used nowadays, manual extraction of the square root is possible. It involves repeated division and subtraction, similar to long division. This method is more complex and requires a good understanding of mathematics.

Examples:

• Example 1: Find the square root of 16.
- Using a calculator, we find that √16 = 4, because 4 x 4 = 16.
• Example 2: Find the square root of 25.
- The square root of 25 is 5, because 5 x 5 = 25.

Square roots are a fundamental operation in mathematics and are very useful in various fields, such as geometry, algebra, and even finance. Understanding how to calculate and apply square roots can open the door to many mathematical applications.