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Dau coroana.Rezolvati in R ecuatia: a) 6x2+0,2x=0 b) 5x2-6x+1=0 c) 3x(3x-2)+7=6

Răspuns :

a)6x2+0,2x=0 x(6x+0,2)=0<=>[x1=0;x2=-12 b)5x2-6x+1=0 delta=36-20=16 x1=6-4supra10=1supra5 x2=6+4supra10=1