Working with Complex Numbers
In This Chapter
Setting the mode to a + bi
Entering complex numbers
Deciphering strange-looking results
Utilizing the CMPLX menu
Early on in your math journey, you were probably told that you can’t take the square root of a negative number. Then a teacher blew your mind by saying you really can take the square root of a negative number and the result will contain the imaginary number, i. Complex numbers are of the form a + bi, where a is the real part and b is the imaginary part. Fortunately, your calculator knows how to handle complex numbers. In fact, there’s a CMPLX menu of functions on your calculator designed to accomplish just about any task you need to when working with complex numbers.
Setting the Mode
Try evaluating in your calculator. On the Home screen, press `q_1e. There’s a good chance you’ll get an ERROR: NONREAL ANSWERS message, as shown in the first screen in Figure 5-1.
In Real mode, your calculator usually returns an error ...