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Aduceti la forma cea mai simpla [tex] \frac{2}{5} [/tex] · 0,25 +78:4-8√5 :√5-3·7√2

Răspuns :

2/5.25/100+39/2-8√5/√5-3.7√2=
1/10+39/2-8-21√2=
aducem la acelasi numitor
(1+195-80-210√2)/10=(116-210√2)/10=(58-105√2)/5