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sub al 2-lea orice exercitiu va rog.

Sub Al 2lea Orice Exercitiu Va Rog class=

Răspuns :

4.
X^2/radical11-radical7=radical11+radical 7
X^2=radical11^2-radical 7^2
X^2=11-7
X^2=4/ aplicam radical
Radical x^2=radical 4
X=2