Isolating y in Equation: y^2 + 2y = -2x +2

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SUMMARY

The discussion centers on isolating the variable y in the quadratic equation y^2 + 2y = -2x + 2. The correct solution involves applying the quadratic formula, resulting in y = -1 ± √(3 - 2x). Participants confirmed that recognizing the equation's quadratic nature is essential for deriving the correct expression for y.

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ACE_99
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Homework Statement


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

The Attempt at a Solution


In my solutions it says that the answer after you isolate for y you should get

y = -1 + [tex]\sqrt{3-2x}[/tex]

Im not sure how they got that though.
 
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I assume you mean that the answer is [tex]y=-1 \pm \sqrt{3-2x}[/tex]?

Your equation is quadratic in [itex]y[/itex], so I would use the quadratic equation.:wink:
 
Oh I totally missed that. I tried it out and it works. Thanks a lot!
 

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