Question

z^2+z+3=0
Решить уравнение ( комплексные числа)

Answer 1

$z^{2} +z+3=0 \ D=1-4*1*3=-11 \ z_{1} =(-1- sqrt{11}) /2 \ z_{2} =(-1+ sqrt{11}) /2$

Answer 2

z^2+z+1/4+2+3/4=0
(z+1/2)^2=-2-3/4
z+1/2=√(-11/4)
z+1/2=√(-11)/2
z=(√(-11)-1)/2