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rezolvati in r ecuatia
√2x+3=x


Răspuns :

(√2x+3)²=x²
2x+3=x²
-x²+2x+3=0     inmultim -1
x²-2x-3=0
Δ=4+12=16
x1=(2-4)/2=-2/2=-1
x2=(2+4)/2=6/2=3
S={-1,3}