Writing squared numbers, such as 10 with a raised 2 next to it, on a computer can be tricky, especially if the processor you are using does not have a superscript function, which allows small numbers to be written higher than the preceding number. Plain text suffers from such limitations. Luckily, you can express superscript numbers in a few different ways.
Look for a superscript function in the program you are using, which may be located under the Formatting tab or menu. Highlight the "2" that you want to superscript and click the superscript function to superscript it. That will make it smaller and raised up. All programs operate a little differently, so you may have to search the help files for "superscript."
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Write the number followed by "^2," which is the textual representation of squared.
Write the number followed by "-squared," such as "10-squared."
Present the numbers as a formula, such as "(10 x 10)," which is what squared means.