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ex 2 va rog frumos...

Ex 2 Va Rog Frumos class=

Răspuns :

(x²-2xy+y²+x²+2xy+y²)²-(x²+2xy+y²-x²+2xy-y²)²-4x⁴+8x²y²-4y⁴=
(2x²+2y²)²-4xy-4x⁴+8x²y²-4y⁴=
4x⁴+8x²y²+4y⁴-4xy-4x⁴+8x²y²-4y⁴=
16x²y²-4xy=
4(x²y²-xy)