## Math Basics## Basic Mathematical Operations |

## What are square and square roots? |

When you multiply a real or complex number by itself, you are actually squaring that number. Mathematicians express the square of a number using the superscript 2, or, for example, 2^{2}. The square of a real number is always positive, whether the number is 2^{2} (= 4) or -2^{2} (= 4; a negative times a negative equals a positive real number).

A square root is a number that when multiplied by itself equals a specific product. For example, if *t*^{2} = *s*, then , in which *t* is the square root and *s* is a positive number. For example, the two square roots of are 4 and -4, as 4^{2} = 16 and -4^{2} = 16.