Respostas

2014-06-02T07:35:07-03:00
Δ= -2²- 4.1.5=
Δ= -16

x= 2√-16/  2.1= 
x= 2√-4/ 2=
x=22i/ 2=

x'= 2+ 2i /2= 2/2 +2i/2= 1+i
x"2- 2i /2= 2/2+-2i/2= 1-i