How do i express a complex number in exact cartesian form?
Whats the process?
heres another example i tried but looking at answer its not quite right:
((1-2i)/(3+4i)) - ((2+i)/5i)
so i first did subtraction of the top and bottom and got:
I then performed division and got this:
((-3+3)/(9+1)) + ((-9+1)/(9+1))i
which simplifies to this:
0 + (-8/10)i
But that isint correct as the answer is -2/5
what am i doing wrong?
The question you gave was
This is two fractions with different denominators. If you recall your basic addition and subtraction of fractions, you don't subtract top and bottom. You need to make a common denominator first, and then subtract the top
Expand that and factorise, and you should get the answer.