SOLUTION: This is a pre-calculus question but I really need help! 4+3i ---- 4-3i I know the bottom half gets turned into its conjugate (4+3i) but I don't know what to do from the

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: This is a pre-calculus question but I really need help! 4+3i ---- 4-3i I know the bottom half gets turned into its conjugate (4+3i) but I don't know what to do from the      Log On


   

Question 786098: This is a pre-calculus question but I really need help!
4+3i
----
4-3i
I know the bottom half gets turned into its conjugate (4+3i) but I don't know what to do from there.
Thank you!
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
%28%284%2B3i%29%29%2F%28%284-3i%29%29
Multiply by the conjugate of the denominator over itself, (same as multiplying by 1)
%28%284%2B3i%29%29%2F%28%284-3i%29%29 * %28%284%2B3i%29%29%2F%28%284%2B3i%29%29
FOIL
%28%2816%2B12i%2B12i%2B9%28i%5E2%29%29%29%2F%28%2816%2B12i-12i-9%28i%5E2%29%29%29 = %28%2816%2B24i%2B9%28-1%29%29%29%2F%28%2816-9%28-1%29%29%29 = %28%2816%2B24i-9%29%29%2F%28%2816%2B9%29%29 = %28%287%2B24i%29%29%2F25