Question

Resolva as equações no campo dos complexos. A) x^2+2x+2=0 B)3x^2_4x+8=0

Answer 1

x²+2x+2=0
 
2x+x= 3x 
x² + 3x + 2 =0 

ax² + bx + c 

a=1 b=3 c=2 
∆ =b²-4.a.c 

x= -b± √∆/ 2a 
x= -3± √3² - 4.1.2/ 2.1 
x= -3± √9 - 8/ 2 
x= -3± √1/ 2 
x= -3± 1/ 2 ----> x1= -3+1/2 = -2/2= -1 
x2= -3-1/2 = -4/2 = -2 
-4/2=-2