complete the square to write the equation of the sphere in standard form. find the center and the radius...
x^2+y^2+z^2-4x-6y+4=0
i dont know how to complete the square like this...can anyone help????
is that just a 4? should it be 4z?
just group like terms and complete the square. so complete the squares for x^2 - 4x and y^2 - 6x separately. as for the z's, i am waiting on your response.