Alright, thank you very much.

However

I can't find the right answer?

In the book with this kind of question, they end up with a nice easy answer. For example, from the formula y= x^2 + 5x +6 -x, they come up with k= -1/4.

When I proceed with what you left me off with. I come up with:

k^2-2k+5 = 0

Now, I am not sure if I did that right, because I was a little confused as to the reason you rearanged the formula in the last line you gave me. To me, it gave the same answer as if I worked it out in left side of that statement.

Anyways, I am wondering why I am left with another quadratic equation when I should have a single answer? Argh, why couldn't they make it easy like the example they give me?

I am supposed to use the quadratic formula again on that? But then k is no longer in my equation? And I am supposed to get a single answer, not roots.. So I am confused.