Răspuns:
[tex] \frac{9}{9} - \frac{3}{2} \\ 1 - \frac{3}{2} \\ 1 \times \frac{2}{2} - \frac{3}{2} \\ \frac{2}{2} \\ \frac{2 - 3}{2} \\ - \frac{ - 1}{2} [/tex]
