The (insert answer) square root is known as the principle square root

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis. how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

Select the quadratic that has root x = 8 and x = -5