Răspuns:
Deci....
[tex]81 \sqrt{5} \times 0.(3) = [/tex]
[tex]81 \sqrt{5} \times \frac{3}{9} = [/tex]
[tex]9 \sqrt{5} \times 3 = [/tex]
[tex]27 \sqrt{5} [/tex]
Succes...
