SOLUTION: Find the center ( h,k) and the radius r of the circle. Graph the circle X^2+y^2+6x+10y+18=0

Algebra ->  Graphs -> SOLUTION: Find the center ( h,k) and the radius r of the circle. Graph the circle X^2+y^2+6x+10y+18=0      Log On


   

Question 919630: Find the center ( h,k) and the radius r of the circle. Graph the circle
X^2+y^2+6x+10y+18=0
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2B6x%2By%5E2%2B10y%2B18=0
%28x%5E2%2B6x%29%2B%28y%5E2%2B10y%29%2B18=0
You need to complete-the-square for the x and the y, before converting the equation into the standard form for a circle.

See this: http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev

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