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Determinati nr reale x si y stiind ca:
x²-x+9y²-3y+1/2=0


Răspuns :

x²-x+9y²-3y+1/2=0

x²-x+1/4+9y²-3y+1/4=0

(x-1/2)²+(3y-1/2)²=0

x-1/2=0; x=1/2

3y-1/2=0; 3y=1/2; y=1/6