Odpowiedź:
[tex]1)\\x\le0\quad y\le0\\x^{2} +2x+y^{2} +4y=0\\(x+1)^2-1+(y^2+2)-4=0\\(x+1)^2+(y^2+2)=5\\2)\\x\le0\quad y\ge0\\x^{2} +2x+y^{2} -4y=0\\(x+1)^2-1+(y-2)^2-4=0\\(x+1)^2+(y-2)^2=5\\3)\\x\ge0\quad y\le0\\x^{2} -2x+y^{2} +4y=0\\(x-1)^2-1+(y+2)^2-4=0\\(x-1)^2+(y+2)^2=5\\4)\\x\ge0\quad y\ge0\\x^{2} -2x+y^{2} -4y=0\\(x-1)^2-1+(y-2)^2-4=0\\(x-1)^2+(y-2)^2=5\\[/tex]
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Odpowiedź:
[tex]1)\\x\le0\quad y\le0\\x^{2} +2x+y^{2} +4y=0\\(x+1)^2-1+(y^2+2)-4=0\\(x+1)^2+(y^2+2)=5\\2)\\x\le0\quad y\ge0\\x^{2} +2x+y^{2} -4y=0\\(x+1)^2-1+(y-2)^2-4=0\\(x+1)^2+(y-2)^2=5\\3)\\x\ge0\quad y\le0\\x^{2} -2x+y^{2} +4y=0\\(x-1)^2-1+(y+2)^2-4=0\\(x-1)^2+(y+2)^2=5\\4)\\x\ge0\quad y\ge0\\x^{2} -2x+y^{2} -4y=0\\(x-1)^2-1+(y-2)^2-4=0\\(x-1)^2+(y-2)^2=5\\[/tex]