Asked by Kiley

solve the equation:

x^2-x+2=0

is 1+9i/2 the correct answer?
Answered by 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?
Answered by Kiley
Where does the seven come from?
Answered by 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.

Answered by Kiley
ohhhh! okay thank you!
Answered by DanH
You're welcome
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