Question 9.6: If z1 = 3 − 4j and z2 = 4 + 2j find z1 + z2 and z1 − z2....
If z_1 = 3 − 4j and z_2 = 4 + 2j find z_1 + z_2 and z_1 − z_2.
Step-by-Step
\begin{aligned}z_1+z_2 & =(3-4 j)+(4+2 j) \\& =(3+4)+(-4+2) j \\& =7-2 j \\z_1-z_2 & =(3-4 j)-(4+2 j) \\& =(3-4)+(-4-2) j \\& =-1-6 j\end{aligned}
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