A surd is a mathematical term used to describe a number that cannot be expressed as a rational number. Surds are often represented using the radical symbol, which is the symbol used to denote square roots. When a number is expressed as a surd, it is usually in the form of a square root, such as √3 or √5.

Surds are often used in mathematical equations and calculations, and they can be simplified or manipulated in a number of ways. One common way to simplify a surd is to rationalize the denominator, which means to multiply the numerator and denominator by the square root of the number under the radical sign. This can often make equations and calculations involving surds much easier to solve. What is an example of a surd? A surd is an irrational number that cannot be expressed as a rational number. Examples of surds include √2 (the square root of 2), √3 (the square root of 3), and √5 (the square root of 5). Why is it called surd? The reason why it is called surd is because it is an irrational number. Is root 25 a surd? Yes, root 25 is a surd. Is √ 7 is a surd? Yes, √ 7 is a surd, which is defined as a square root of a non-perfect square.

#### What is simple surd?

A surd is an irrational number that cannot be expressed as a rational number. In other words, it is a number that cannot be expressed as a fraction. Surds can be either real or complex numbers.

The term "simple surd" is typically used to refer to a surd that is not a perfect square. For example, the square root of 2 is a simple surd, because it cannot be expressed as a rational number, and it is not a perfect square.