SOLUTION: Find the Center and Radius from the equation of the circle. Write the equation in Standard Form. Show all steps of your algebraic solution. x2+y2-4x-2y-15=0

Algebra ->  Circles -> SOLUTION: Find the Center and Radius from the equation of the circle. Write the equation in Standard Form. Show all steps of your algebraic solution. x2+y2-4x-2y-15=0       Log On


   

Question 471426: Find the Center and Radius from the equation of the circle. Write the equation in Standard Form. Show all steps of your algebraic solution.
x2+y2-4x-2y-15=0

Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
the equation in Standard Form
%28x%5E2-4x%29%2B%28y%5E2-2y%29-15=0
%28x%5E2-2%2Ax%2A2%2B2%5E2%29-4%2B%28y%5E2-2%2Ay%2A1%2B1%5E2%29-1-15=0
%28x-2%29%5E2%2B%28y-1%29%5E2-20=0
%28x-2%29%5E2%2B%28y-1%29%5E2=20
the Center is (2,1), the Radius is R=sqrt%2820%29