# Isolating for Y

1. Dec 11, 2008

### ACE_99

1. The problem statement, all variables and given/known data
I realize this is probably a very simple question but I just can't seem to figure it out. I need to isolate the following equation for y.

y^2 + 2y = -2x +2

3. The attempt at a solution
In my solutions it says that the answer after you isolate for y you should get

y = -1 + $$\sqrt{3-2x}$$

Im not sure how they got that though.

2. Dec 11, 2008

### gabbagabbahey

I assume you mean that the answer is $$y=-1 \pm \sqrt{3-2x}$$?

Your equation is quadratic in $y$, so I would use the quadratic equation.

3. Dec 11, 2008

### ACE_99

Oh I totally missed that. I tried it out and it works. Thanks a lot!