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Calculati a=|2radical 7-8|
b=|2radical7+8| plizz am nevoie de ajutor help


Răspuns :

a=|2√7-8| ⇔a=| 2√1|⇔a=|2·1| ⇔ a=2

b=|2√7+8| ⇔b=|2√15| ⇔b=2√15