खालीलपैकी कोणता पर्याय \(y^2 - x^2\) मधून \(x^2 - y^2\) वजा केल्यावर मिळतो?

1
-2(x2-y2)
2
-2(x2+y2)
3
2(x2+y2)
4
2(x2-y2)

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