Leah0713
Leah0713
09-07-2018
Mathematics
contestada
what is the standard form of x^2+y^2-4x+12y-20=0
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DeanR
DeanR
09-07-2018
That's a circle; we complete the square.
[tex]x^2+y^2-4x+12y-20=0[/tex]
[tex](x^2-4x)+(y^2+12y)=20[/tex]
[tex](x^2-4x + 4)+(y^2+12y + 36)=20 + 4 + 36[/tex]
[tex](x-2)^2+(y+6)^2=60[/tex]
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