Question

Rezolvati in C ecuatia z la puterea 2 -2z+4=0

Answer 1

   
[tex]\displaystyle\\ z^2 -2z+4=0 \\ \\ z_{12} = \frac{-b\pm \sqrt{b^2-4ac} }{2a} =\\\\ = \frac{2 \pm \sqrt{4-16} }{2} =\frac{2 \pm \sqrt{-12} }{2} =\frac{2 \pm 2 i\sqrt{3} }{2} =1\pm i \sqrt{3} \\ \\ \boxed{z_1 =1 + i \sqrt{3} }\\\\ \boxed{z_1 =1 - i \sqrt{3} }[/tex]