Question

Z1=5+i,z2=1+2i Найти:z1+z2,z1-z2,z1*z2,z1/z2

Answer 1

Z1+z2=6+3i
z1-z2=(5+i)-(1+2i)=(5-1)+(i-2i)=4-i
z1*z2=5+10i+i-2=3+11i
z1/z2=[(5+i)(1-2i)]/(1+4)=(5-10i+i+2)/5=(7-9i) /5=7/5-9i/5