1.

z _ { 1 } = 2 + i , z _ { 2 } = 2 - 3 i , z _ { 3 } = 4 + 5 i , \text { evaluate Re } \frac { z _ { 1 } \overline { z } _ { 2 } } { z _ { 3 } }

Answer»

z1 z2*=(2+i)(2+3i)=4+8i-3=1+8iz1 z2* /z3 =(1+8i)/(4+5i)=(1+8i)(4-5i)/(4+5i)(4-5i)=(44-27i)/41real part=44/41


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