The square root of 4 is +2 or -2. The square root of a number can be either positive or negative. This is because the square of +2 is 4 and the square of -2 is also 4. More »

www.reference.com Math Algebra

Technically, the square root of a negative number cannot be taken, but if imaginary numbers are allowed, the answer would be 2i. It can be tempting for those people just learning how to deal with square roots to assume t... More »

A square root is the result of "unsquaring" a number, or the reversal of the process of squaring. The root is, as its name implies, a squared number reduced to its most basic form. More »

www.reference.com Math Algebra

The square root of 156 is 12.4899959968. When a person multiplies the number 12.4899959968 by itself, the answer results in 156. More »

To find a number's square root, determine which two perfect squares the number lies between and estimate a fraction between those two perfect square roots. If it is a perfect square itself the square root can be arrived ... More »

The square root of 256 is 16. A square root is the inverse, or opposite, operation of squaring. This means that the means of finding the square root is to determine which number multiplied by itself results in the intege... More »

To find the magnitude of a vector, square the endpoints, add them and take the square root of that number. The magnitude will always be either zero or a positive number. It is defined as the length of a vector. More »