Question

Modulul numarului complex
z=(2+i) (3-i) (3+i)

Answer 1

z= (6+2i+3i+1)(3+i)= (7+5i)(3+i)=

=21+7i+15i-5= 16+22i

|z| =

$+ \sqrt{16 {}^{2} + {22}^{2} } = \sqrt{740}$

Answer 2

Răspuns:

$..............................$