Question

(z1=2+3i), z2=4+i)
Z1-z2, z1:z2, z2:z1

Answer 1

$z1-z2=2+3i-4-i=2i-2$
$frac{z1}{z2} = frac{2+3i}{4+i}$
$frac{z2}{z1} = frac{4+i}{2+3i}$