Posted by Kiley on Monday, November 3, 2008 at 6:17pm.
solve the equation:
x^2x+2=0
is 1+9i/2 the correct answer?

Algebra 2  DanH, Monday, November 3, 2008 at 6:45pm
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  DanH, Monday, November 3, 2008 at 7:01pm
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, Monday, November 3, 2008 at 7:09pm
ohhhh! okay thank you!

Algebra 2  DanH, Monday, November 3, 2008 at 7:13pm
You're welcome
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