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Calculati
3√48-4√(-5)^2
(√5+√3)^2-2(√5+√3)^2
Multumesc


Răspuns :

3√48-4√(-5)²=3 x 4√3 - 4 x 5= 12√3 - 20

(√5+√3)
²-2(√5+√3)²= 5 + 2√15 + 3 - 2 × ( 5 + 2√15+3)=
=5+2√15+3-10- 4√15 -6=
= - 2√15 - 11