Question

what Is the.value of 5^3i^9

Answer 1

$5^3=5\cdot5\cdot5=125\\\\i=\sqrt{-1}\to i^2=-1\\\\i^9=i^8+1=i^8\cdot i^1=-1\cdot i=-i\\\\5^3i^9=125(-i)=\boxed{-125i}$

Answer 2

Answer:-125i

Step-by-step explanation:

I got it right on the test.