Which type of conic section is described by the equation \[(x-y)(x+y) = -2y^2 + 1?\]Enter "C" for circle, "P" for parabola, "E" for ellipse, "H" for hyperbola, and "N" for none of the above.
Question:
Which type of conic section is described by the equation \[(x-y)(x+y) = -2y^2 + 1?\]Enter "C" for circle, "P" for parabola, "E" for ellipse, "H" for hyperbola, and "N" for none of the above.
Answer:
Let's think step by step.

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\text{(C)}
Which type of conic section is described by the equation \[(x-y)(x+y) = -2y^2 + 1?\]Enter "C" for circle, "P" for parabola, "E" for ellipse, "H" for hyperbola, and "N" for none of the above.
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