## alexsu22 3 years ago Evaluate expression.

1. alexsu22

$2i^{124}-3i^{10}$

2. drpeppergal

What does i =?

3. alexsu22

it stands for...$\sqrt{-1}$

4. drpeppergal

Sorry I don't do Square Roots. :(

5. alexsu22

Darn :/

first you must know that i^2=-1...so, you've got 2i^124=2*(i^2)^62=2*62=124 then 3*i^10=3*(i^2)^5=3*(-1)=-3 so the result is 124-(-3)=127

oh sorry I made the mistake in the begining 2*(i^2)^62=2*1=2 the other part is fine so the result is2-(-3)=5 sorry if you got confused :D

8. alexsu22

Oh well thanks