[tex] \sqrt{20449} + \sqrt{285156} - \sqrt{54289} =[/tex]
Trebuie descompuse numerele
20449=[tex] 11^{2} * 13^{2} [/tex]
285156=[tex] 2^{2}* 3^{2}* 89^{2} [/tex]
54289=[tex] 233^{2} [/tex]
Dupa scoaterea de sub radical iti ramane:
11*13+2*3*89-233=
143+534-233=444