[quote=&quot;Roland&quot;:2w6afp8j]ma nell'esercizio 2 la retta r2 non dovrebbe essere y=-3x+3 ?[/quote:2w6afp8j]

Giustissimo <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: -->  <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: --> ho corretto i post precedenti <!-- s:D --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt=":D" title="Very Happy" /><!-- s:D -->