how do you write the quotient (9+i) over (9-i) in standard form? I need the answer but more importantly, I need to learn how to

Question

xenn [34]

3 years ago

12

how do you write the quotient (9+i) over (9-i) in standard form? I need the answer but more importantly, I need to learn how to

solve these kinds of problems.

Mathematics

1 answer:

Scorpion4ik [409] · Answer 1 · 2022-05-20T23:46:17+03:00

Since they are the conjugates of each (9-a and 9+a are conjugates, or with any number replacing 9) , we multiply it by (9+i)/(9+i) to get (9+i)^2/(9-i^2)=(81+2i+i^2)/(9-(-1))=(81-1+2i)/(10)=80/10+2i/10=8+i/5. Conjugates work because they make i into i^2 (-1) without any of the sneaky i's in the middle!