Reciprocal of a complex number
I am asked to solve this
I looked over the book to see how this is done...
according to the book
is to be written in stnrd form a+bi, so then one must multiply both the denominator and numerator by the opposite of the denominator in this case 3-4i.
Ok here is where I don't get it, what happened(s) to the and the signs in the denominator of
is the multiplication process of the denominator the same as using foil?! or am I just full of complex numbers!?
Where did the 25 come from?!
Thanks in advance to all!!