Odpowiedź:
[tex] \frac{2}{5} \times ( - \frac{2}{5} ) \times ( - \frac{1}{2} ) = ( - \frac{4}{25} ) \times ( - \frac{1}{2} ) = \frac{4}{50} = \frac{2}{25} [/tex]
2/5*(-2/5)*(-1/2)= 4/50=2/25
