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Damaris2003
a fost răspuns

AJUTOOOOOR!!!DAU CORONITA!!!

AJUTOOOOORDAU CORONITA class=

Răspuns :

InfinityForever
a) x² +y² +4x -6y +13 =0
x² +4x +4 + y² -6y +9 =0
(x + 2)² + (y - 3)² =0
(x+2) ² = 0
x+2=0
x= -2
(y-3)² = 0 => y-3 =0 => y = 3

b) x^2+2x+1+4y^2+4y+1=0
(x+1)^2+(2y+1)^2=0
x+1=0 => x=-1
2y+1=0 => 2y=-1 => y=-1/2

c)