**b1o2r3i4s5**

If I were you, I'd just google "de moivre's theorem" and put that in wolfram alpha to make myself look smart

de moivre's theorem:

(rcis(theta))^n = r^n cis(n*theta)

roots of (27 cis(pi/2) )^3 = (27 cis(pi/2) )^(1/3)

apply de moivre's theorem

roots on an argand diagram:

(Source: Wolfram Alpha)

IB Maths HL beaoch!

...we never ever ever touched on that.