How Do We Use Imaginary Numbers ?

             Using imaginary numbers is quite simple. First you need to know that " i " is defined as  " √-1 "
                                                         " i=√-1 "
       This is also known as the imaginary unit. We use imaginary numbers, i , to solve the square

 root of negative numbers. For example, we have the square root of -9. The first step to solve 

this is to make -9 positive by making -9 equal to the square root of -1 and positive 9. Knowing 

that the square root of -1 is equal to i, you replace √-1 wit i . Knowing that 9 is a perfect square, 

you can simplify it to 3. When working with imaginary numbers, i come after the real number 

only under the exception that the number is still in square root form. The final answer for the √-9 

is 3i. 


              

         Here's a visual of what i just explained : 

                                     
                                √-9 = √-1 √9

                                      = i√9
                                                            
                                      = 3i 



Now Try It Yourself Using: 


                                √-25