Răspuns:
2[tex]\\\sqrt{2} \\[/tex]*[tex]\sqrt{5}[/tex]-3[tex]\sqrt{5}[/tex]*[tex]\sqrt{2}[/tex]+4[tex]\sqrt{5}[/tex]*3[tex]\sqrt{2}[/tex]-5[tex]\sqrt{5} *4\sqrt{2}[/tex]=
=[tex]2\sqrt{2*5}-3\sqrt{5*2} +4*3\sqrt{5*2} -5*4\sqrt{5*2}[/tex]=
=[tex]2\sqrt{10} -3\sqrt{10}+12\sqrt{10}-20\sqrt{10}[/tex]=
=[tex]-9\sqrt{10}[/tex]
