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x-2r2>r2-2 
r-radical
Multumesc :*


Răspuns :

x-2√2>√2-2
x>2√2+√2-2
x>3√2-2
x>2-3√2
x-2√2>√2-2 x>2√2+√2-2 x>3√2-2 x>2-3√2