Răspuns :
I.Calculam prima oara [tex] (1+i)^{2} [/tex] = 1+2i+[tex]i^{2} [/tex]
=1+2i-1
=2i
II.Calculam modul de z cu formula IzI=[tex] \sqrt{a^{2}+b^{2} } [/tex]
=[tex] \sqrt{0+2^{2} } [/tex]
=[tex] \sqrt{4} [/tex]
=2
*[tex]i^{2} =-1[/tex]*
*a=0,b=2*
=1+2i-1
=2i
II.Calculam modul de z cu formula IzI=[tex] \sqrt{a^{2}+b^{2} } [/tex]
=[tex] \sqrt{0+2^{2} } [/tex]
=[tex] \sqrt{4} [/tex]
=2
*[tex]i^{2} =-1[/tex]*
*a=0,b=2*