How to Calculate Power of 2

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Raising a number to the power of 2 is also called squaring a number, which means you must multiply the number by itself. The result equals the number squared. The power of 2 is designated by an exponent of 2. For example, in the expression 5^2, the number 2 is the exponent and the number 5 is the base, which is the number being raised to a power. The exponent tells you how many times to use the base as a product. In the expression 5^2, use the base 5 as two products, which equals 5 x 5, or 5 squared.

  • Determine a number to be raised to the power of 2. For this example, use the number 3.

  • Write the expression with the base, 3, and the exponent, 2. This yields the expression 3^2.

  • Write out the expression without the exponent, using the base as two products -- 3 x 3.

  • Multiply 3 times 3, which equals 9. Therefore, 3 raised to the power of 2 equals 9.

Tips & Warnings

  • When you raise a negative number to the power of 2, the result is a positive number, because two negative numbers multiplied together equal a positive number.

References

  • Photo Credit Jupiterimages/Photos.com/Getty Images
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