So I have an equation:

c = x^2 + 4x + 13 + y^2 + 6y.

Let’s say c is a constant. How would I solve for y? I can’t figure it out. Maple tells me that y = -3 ± sqrt(-4 + c – x^2 -4x). How would I get this? I would assume it’s the quadratic formula, but I haven’t gotten it to work.

10 pts. best answer.

Go here and click on show steps:

http://www.wolframalpha.com/input/?i=solve+for+y%2C++c+%3D+x%5E2+%2B+4x+%2B+13+%2B+y%5E2+%2B+6y

I think wolframalpha is better than maple