Question 666443
{{{(-3*3*sqrt(3))(-3*3*sqrt(3))}}} foil this out to get 243.

2){{{5/i = 5/i * (i/i) = 5i/-1 =  -5i}}}
3){{{1/(2i-3) = (1/(2i-3)) * ((2i+3)/(2i+3)) = (2i+3) / (9-4) = (2/5)i - 3/5}}}
4) Do the same thing. Multiply by the conjugate over the conjugate. The conjugate being 2+i.
5) (3+2i)/4 =  3/4 + 1/2i
6) 1/(3+sqrt(-2)) = 1/(3+2i) then multiply by the conjugate over the conjugate. The conjugate is 3-2i.