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Cel mai inteligent răspuns!
2014-09-09T14:41:36+03:00
X1+x2=-b/a=2m+1
x1·x2=c/a=3m
x1+x2+x1·x2=2m+1+3m=15
2m+3m=15-1
5m=14
m=14/5
Spor la lucru!

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