If z =(3+2 i) then z z = ? - Vidyadip

MCQ

If $z =(3+\sqrt{2} i)$ then $z \times z =$ ?

A
11
B
7
C
$\sqrt{11}$
D
5

✓

Answer

(a) 11
Explanation: $zz =| z |^2=\left\{3^2+(\sqrt{2})^2\right\}=(9+2)=11$

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