Question

How do I simplify?
4/(1+i)
the answer is supposed to be 2-2i ??

Answer 1

conflagerate the bottom....

Answer 2

multiply the top and bottom by the conjugate of (1+i) which is (1-i). Simplify.

Answer 3

\[\frac{4}{1+i} * \frac{1-i}{1-i}\]

Answer 4

conjugate! thats the word I wanted lol

Answer 5

4-4i/1+i-i-i2 i2=1 so 4-4i/2 simplify to get 2-2i

Answer 6

i2=-1

Answer 7

Awesome, thank you so much for your help!

Answer 8

welcome from the both of us!