 # Square root  3:49

### Introducing Square Root  2:52

### How to Simplify the Square Root of a Non Square Number  3:03

### Why is it called a SQUARE root?  3:48

### Square root 1 to 30 | Cube root 1 to 30 Mathematics simple and easy square root cube root  3:40

### Approximating a Square Root Without a Calculator

In mathematics, a square root of a number a is a number y such that y2 = a; in other words, a number y whose square (the result of multiplying the number by itself, or y⋅y) is a. For example, 4 and −4 are square roots of 16 because 42 = (−4)2 = 16. Every nonnegative real number a has a unique nonnegative square root, called the principal square root, which is denoted by √a, where √ is called the radical sign or radix. For example, the principal square root of 9 is 3, which is denoted by √9 = 3, because 32 = 3 • 3 = 9 and 3 is nonnegative. The term (or number) whose square root is being considered is known as the radicand. The radicand is the number or expression underneath the radical sign, in this example 9. Explore contextually related video stories in a new eye-catching way. Try Combster now!