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compuneti o ecuatie ce are o solutie in multimea R,dar nu are solutii in multimea Q

Răspuns :

a .   x - √2 =0         x =√2       x ∈R 
b.  x -3· √ 7=0              x = 3 √7
X- radical(3)=0 are solutia radical(3)