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Determinati numerele reale x si y stiind ca :
[tex] x^{2} +2x+ y^{2} +6y+10=0[/tex]


Răspuns :

pt incaput il spargi pe 10 in 1 si 9 si apoi faci patrate perfect
x²+2x+y²+6y+10=0
x²+2x+1+y²+6y+9=0
(x+1)²+(y+3)²=0⇔(x+1)²=0 si (y+3)²=0
(x+1)²=0⇒x+1=0⇒x=1
(y+3)²=0⇒y+3=0⇒y=-3