E
Editor
Sep 18, 2022
What is the difference of the reciprocals of x^2 and y^2?
Difficulty: Easy
A:
\frac{y^2-x^2}{x^2y^2}
B:
\frac{-y^2-x^2}{x^2y^2}
C:
\frac{x^2y^2}{y^2-x^2}
D:
x^2+y^2
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