Question

Solve x2 + 4x + 8 = 0

Answer 1

no solution imaginary my source= http://www.math.com/students/calculators/source/quadratic.htm

Answer 2

\[x _{1,2}= -2\pm \sqrt{4-8}\]
\[x_{1}=-2-2i\]
\[x_{2}=-2+2i\]

Hope this helps

//Ali

Answer 3

by defenition i^2=-1

Answer 4

x_1,_2=(-4+/- sqrt16-32))/2=(-4+/- 4i)/2= -2+/-2i or -2(1+/

Answer 5

= -2(1+/-i)