Surds https://www.youtube.com/watch?v=568dGLFTom8 Definition of surd Any root of a number which can not be exactly found is called a surd.Let a be a rational number and n is a positive integer. If the nth root of x i.e., x1/n is irrational, then it is called surd of order n.Order of a surd is indicated by the number denoting the root.For example, are surds … [Read more...] about Surds