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# What does squared mean in math?

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When a number is squared in math, it means it's been multiplied by itself. For example, two squared is two times two, or four; and 10 squared is 10 times 10, or 100. When a number is squared, it is written as that number (the base) to the second power.

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Whether the base is positive or negative, the base squared is always positive. Two positive numbers multiplied together yield a positive product, and two negative numbers multiplied together always make a positive number as well. A square root of a number is the number which, when multiplied by itself, yields the square. For example, the square root of 25 is either five or negative five because either of those numbers multiplied by itself yields 25.

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## Related Questions

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Four squared in math is 16, as any number squared is multiplied by itself. Another way to express four squared is to say four to the second power.

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Exponential math is any mathematical operation involving an exponent, which is the number or symbol placed above and after another number or symbol to indicate the power to which the former number is to be raised, Wikipedia explains. The operation 4 x 4, for example, is written exponentially as 4^2.

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In math, a ray is part of a line that has an endpoint at its starting point and extends in a certain direction into infinity. Drawing a ray involves placing a line with one endpoint and an arrow point on the other end. To name a ray, the convention is to use the letter at the starting point followed by a letter near the arrow point.