Imaginary Unit

                    Lesson 1

                                                            The imaginary unit is defined as:

                                                                         i=√-1

                                                            An imaginary number occurs when a quadratic equation has no roots in the set of real numbers.

Problem:                   Solve for x:   x²= -36

Solution                    x²=-36

Step 1:  

Solution √x²=√-36

Step 2:                        

Solution x=+√36i; x= +6i

Step 3:           

                                                            Solution                    The answer is:  +6i

 Step 3:                                                                      

 Complete   

                                                            Try two practice problems:  

Evaluate the following;

A.	x^2=-169
B.	x^2+49=0

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