If y=(x+2)/(4-x), what is the value of y when x=5i?

Answer 1

(5i+2)/(4-5i) * (4+5i)/(4+5i) = (2+5i)(4+5i)/(4^2+5^2)
now finish it off

Answer 2

Do I have to FOIL?

Answer 3

I'm still confused not gonna lie