Homework Statement
2x^2+2y^2+2z^2+x+y+Z=9
find center and radii of the sphere
Homework Equations
moving like terms yeilds
2x^2 + x + _ + 2y^2 + y + _ + 2z^2 + z + _ = 9
The Attempt at a Solution
divide out the 2 yeilds
2[ x^2 + 1/2x + _ + y^2 + 1/2y + _ + z^2 + 1/2z + _ ]...