SOLUTION: Write the equation of a circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2+16x+18y=-129

Algebra ->  Algebra  -> Circles -> SOLUTION: Write the equation of a circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2+16x+18y=-129      Log On

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Question 619157: Write the equation of a circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2+16x+18y=-129
Answer by ewatrrr(10682) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

 x^2+y^2+16x+18y=-129

 (x+8)^2 -64  + (y+9) - 81 = -129

 %28x%2B8%29%5E2+%2B+%28y%2B9%29%5E2+=+4%5E2  C( -8,-9) r = 4