Here's how to get it using a TI-84 calculator, if you have one.
Set the mode:
Press MODE
Scroll down till you see this:
REAL a+bi re^(θi)
The calculator comes from the factory with REAL highlighted. You want to
change this.
Press the right arrow key once to highlight "a+bi"
Press ENTER
it will stay highlighted, so leave it that way permanently, as it will
not change anything about the way the calculator functions if you leave
it permanently with "a+bi" highlighted.
Press 2ND MODE (QUIT) to get back to the main screen.
Press CLEAR
Here is how to get "i". It's the middle key on the bottom, the decimal key,
(or the "period" key, if you think of the decimal as a "period".)
But you must press 2ND before you press it.
So type this:
80/(2-6i) <-- where you get the "i" by pressing 2ND then the decimal key,
as explained above
Press ENTER
You will read 4+12i.
It comes out whole numbers in this case. But in cases where it comes out with
decimals, press MATH ENTER ENTER and it will change the decimals to fractions.
For instance if you were to have have this problem:
Type this
(2+7i)/(1+3i)
Press ENTER
Read 2.3+0.1i
Press MATH and ENTER twice, and you will read
23/10+1/10i which is
Edwin
