nie jestem pewna, ale chyba tak powinno być : K=3x(y-2x)+3y² = 3xy - 6x² + 3y²L=3y(y-4x)=3y²-12xyK-L = 3xy-6x²-3y²-3y²-12xy=-9xy-6x²-6y²
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nie jestem pewna, ale chyba tak powinno być :
K=3x(y-2x)+3y² = 3xy - 6x² + 3y²
L=3y(y-4x)=3y²-12xy
K-L = 3xy-6x²-3y²-3y²-12xy=-9xy-6x²-6y²