va roggg ma puteti ajuta si sa imi si explicati va rogggg.Dau coroana

Răspuns:
[tex]11\sqrt{7}-4.9\sqrt{7}+50\sqrt{63} =[/tex]
[tex]=11\sqrt{7} -4.9\sqrt{7} +50\sqrt{3^{2} *7} =[/tex]
[tex]=11\sqrt{7} -4.9\sqrt{7} +50*3\sqrt{7} =[/tex]
[tex]=11\sqrt{7} -4.9\sqrt{7} +150\sqrt{7} =[/tex]
[tex]=156,1\sqrt{7}[/tex]