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URGENT!!! 1) Calculati: (3√3x - 2√2y)(2√3x - 3√2y) - 6(3x+2y)(x-y)

Răspuns :

18x²-9√6xy-4√6xy+12y² -6(3x²-3xy+2xy-2y²) =  18x²-13√6xy+12y²-18x²+18xy-12xy+12y²= -13√xy+24y²+6xy