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[tex](2,5+3) ^{2}[/tex] va rog ajutatima

Răspuns :

[tex](2,5+3)^2=5,5^2= \Big(\frac{55}{10} \Big)^2= \frac{55^2}{10^2}= \frac{}{100} = \frac{3025}{100}=30,25. [/tex]