Find an equation of the largest sphere that passes through the point (−1,1,4) and is such that each of the points(x, y,z) inside the sphere satisfies the equation: x^2 + y^2 + z^2 < 136 + 2(x + 2y + 3z)

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Just tell me how to set up the equation.