If z1 = 2 – i, z2 = 1 + i, find 
Given:
⇒ z1=2-i and z2=1+i
We have to find 
We know that 
is 
⇒ 
⇒ 
⇒ 
We know that |a+ib| is 
.
⇒ 
⇒ 
⇒ 
∴ The value of 
is 
.
5
If z1 = 2 – i, z2 = 1 + i, find
Given:
⇒ z1=2-i and z2=1+i
We have to find
We know that is
⇒
⇒
⇒
We know that |a+ib| is .
⇒
⇒
⇒
∴ The value of is .