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OpenStudy (anonymous):
What do the graphs 3x-y=-2 and x^2-y^2=-2 look like? I'm thinking the first one is a line but what's the second one? I know x^2 + y^2 = r^2 is the equation for a circle, but this one has a minus sign instead of the plus sign.
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OpenStudy (asnaseer):
It is called a hyperbola. You can use wolfram alpha to help you: http://www2.wolframalpha.com/input/?i=x%5E2-y%5E2%3D-2
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