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Efectuati:
2x·0,5y-0,3x·5y+1,25x·y+0,5x·0,5y
Va rog mult de tot.


Răspuns :

2*5/2*xy-(3*5)/10*xy+125/100*xy+(5*5)/100*xy=
xy-3/2xy+5/4xy+1/4xy=
(4xy-6xy+5xy+xy)/4=4xy/4=xy
2*5/2*xy-(3*5)/10*xy+125/100*xy+(5*5)/100*xy= xy-3/2xy+5/4xy+1/4xy= (4xy-6xy+5xy+xy)/4=4xy/4=xy sper ca ti-am fost de folos.