How do I find the complex roots using the quadratic forumula for 4th degree poly?

For:

how can I use the quadratic formula to find the complex roots?

I tried substituting , but when I use the quadratic formula I get real answers and don't know where to substitute back in.

I also tried thinking of the values for a b and c as z^2, 7 and 2, but I cam across difficulties when trying to simplify the contents of the square root.

Re: How do I find the complex roots using the quadratic forumula for 4th degree poly?

Quote:

Originally Posted by

**terrorsquid** For:

how can I use the quadratic formula to find the complex roots?

I tried substituting

, but when I use the quadratic formula I get real answers and don't know where to substitute

back in.

I also tried thinking of the values for a b and c as z^2, 7 and 2, but I cam across difficulties when trying to simplify the contents of the square root.