1. Rationalise the denominator
(20+10i+10i-5)/2^2-i^2
2. Collect like terms
((20-5)+(10i+10i))/2^2-i^2
3. Simplify (20-5)+(10i+10i) to 15+20i
15+20i/2^2-i^2
4. Simplify 2^2 to 4
15+20i/4-i^2
5. Use square rule
15+20i/4-(-1)
6. Simplify brackets
15+20i/4+1
7. Simplify 4+1 to 4
15+20i/5
8. Factor out the common term 5
5(2+4i)/5
9. Cancel 5
3+4i
10. Your final answer
3+4i
Have a nice day ;D
Your answer would be the 60+20 70 minus the 150 but you would have to take 150-70 and your answer would be 80
亜タネがおるーありがとうございましたおやすみなさいましたちゃんはありがとうございます目をして良い人それぞれだけど、。
All you potentially have to do is subtract 3/5 from 1 = 1-3/5 = 2/5..
hope the helps