alleryFind the modulus of the complex number $z = 3 + 4i$.
A$12$
B$5$
C$7$
D$\sqrt{7}$
Answer & Solution
Correct answer: B. $5$
$|z| = \sqrt{x^2 + y^2} = \sqrt{9 + 16} = \sqrt{25} = 5$.
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