( [tex]2\sqrt{11}[/tex]-1)( [tex]3\sqrt{11}[/tex]+4)= [tex]2\sqrt{11}[/tex]· [tex]3\sqrt{11}[/tex]+ [tex]2\sqrt{11}[/tex]·4-1· [tex]3\sqrt{11}[/tex]-1·4=66+ [tex]8\sqrt{11}[/tex]- [tex]3\sqrt{11}[/tex]-4=62+ [tex]5\sqrt{11}[/tex]
Sper să te ajute! ^_^