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a)2
2(3xy+6x²y²+12x²y)
b)-6
-6(-xy+2x²y²-4x²y)
c)3xy
3xy(2-4xy+8x)
a)przed nawias 2
6xy-12x²y²+24x²y=2(3xy-6x²y²+12x²y)
b)-6
6xy-12x²y²+24x²y=-6(-xy+2x²y²-4x²y)
c)3xy
6xy-12x²y²+24x²y=3xy(2-4xy+8x)