Question

Solve the equation (6+2i)(3i)

Answer 1

$3i(6+2i) = 18i+6i^2 = 6i(3+i)$ if i is a variable

$3i(6+2i) = 18i+6i^2=18i+6(-1) = -6+18i = 6(-1+3i)$ if i is the imaginary unit defined by i²=-1