Question

If Z1=2+i, z2=3-2i ,find |3z1-4z2|=?

Answer 1

z1=2+i
z2=3-2i
3z1=3(2+i)=6+3i
4z2=4(3-2i)=12-8i
|3z1-4z2|
|6+3i-12+8i|
|-6+11i|