Răspunsuri

2014-07-17T17:49:04+03:00
\displaystyle (2+i)(3-2i) - (1-2i ) (2-i)=\\
=(6-4i+3i-2i^2)-(2-i-4i+2i^2)=\\
(6-i+2)-(2-5i-2)=6-i+2-2+5i+2=8+4i
(2+i)(3-2i)-(1-2i)(2-i=
(2+i)(3-2i) - (1-2i ) (2-i)=8+4i