Question

A circle is defined by the following equation:
3x^(2)+3y^(2)-30x+27=0
What are the coordinates of its center?

Answer 1

15,0

Answer 2

oh sorry 5,0

Answer 3

yeah its 5,0
the eqn of a circle is x^2 + y^2 +2gx + 2fy +c=0
then the circle lies at (-g.-f)

Answer 4

so u first divide this eqn by 3 to get it in the above form, and then see -10 =2g
g=-5 so centre is 5,0