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vaaaaaa roooooooog efectuati:-2x(3xy-5y)=

Răspuns :

-2x(3xy-5y)= =-6x²y+10xy
...................
-2x(3xy-5y)
(Desfacem paranteza)
=-2x•3xy•(-5y)
=-6x²y+10xy
Succes!