x2 + y2 − 2x +10y +9 = 0

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- Mar 12th 2011, 01:19 AMphiljerryfind the center of the circle and radius from this equation.x2 + y2 − 2x +10y +9 = 0
- Mar 12th 2011, 01:23 AMmr fantastic
- Mar 12th 2011, 01:24 AMProve It
Complete the square on the $\displaystyle \displaystyle x$ terms, complete the square on the $\displaystyle \displaystyle y$ terms, and move any remaining constants to the RHS.

This will put the equation into the required form, i.e. $\displaystyle \displaystyle (x - h)^2 + (y - k)^2 = r^2$.