To solve this we introduce the idea of the imaginary number.
													
																	What is a root in math. 
									
	
		
	
																	For example the second root of 9 is 3 because 3x3 9. 
																	In mathematics a square root of a number x is a number y such that y 2 x. 
																	It involves the symbol i which stands for the square root of negative one. 
																	For example 4 and 4 are square roots of 16 because 4 2 4 2 16 every nonnegative real number x has a unique nonnegative square root called the principal square root which is denoted by x where. 
															
													
									
	
		
	
																	Root of a number. 
																	For a function f x the roots are the values of x for which f x 0. 
																	However in math and engineering we frequently have the need to find the square root of a negative number. 
																	Definition of root as used in math. 
															
													
									
	
		
	
																	In other words a number y whose square the result of multiplying the number by itself or y y is x. 
																	Root in mathematics a solution to an equation usually expressed as a number or an algebraic formula. 
																	A root is a value for which a given function equals zero.