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OpenStudy (anonymous):
Reduce the equation to one of the standard forms and classify the surface: x^2-y^2+z^2-4x-2y-2z+4=0. I simplified: (x-2)^2+(z-1)^2=(y+1)^2. Would this be a cone?
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OpenStudy (anonymous):
yea according to my textbook it's an elliptic cone (double cone)
OpenStudy (anonymous):
Ok, thank you!!!
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