Posted by Kiley on .
solve the equation:
x^2x+2=0
is 1+9i/2 the correct answer?

Algebra 2 
DanH,
No, that is not the answer I get when I plug in to the quadratic formula.
I get
(1 + sqrt7i)/2
and
(1  sqrt7i)/2
Do you understand how I got this? 
Algebra 2 
Kiley,
Where does the seven come from?

Algebra 2 
DanH,
sqrt(b^2  4ac).
b is 1 and a is 1 and c is 2.
So, sqrt(b^2  4ac) is
sqrt(7), or (sqrt7)i. 
Algebra 2 
Kiley,
ohhhh! okay thank you!

Algebra 2 
DanH,
You're welcome