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aduceti la forma cea mai simpla expresia
2supra lui 5 ·0,25 +78:4-8√5:√5-3·7√2


Răspuns :

2/5*0,25+78:4-8√5*√5*3*7√2

2/5*1/4+19,5-8*1*3*7√2

1/5*1/2+39/2-168√2

1/10+39/2-168√2

=-98/6-168√2


Sau -217,888