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am nevoie urgentttt!!!!

Am Nevoie Urgentttt class=

Răspuns :

1) 3(х-2)=3-2х=1х
2)2х(х+1)=2+1(х•х)=3х2 (la puterea doua)
3)3x(x2-x+1)=3+1(x•x2-x)=4х2 (la puterea doua)
4)am uitat cum scuz