Determine the equation of the circle by the following information/transformation without graphing.
a.) A circle with centre (2,-3) and passing through (1,4) is reflecred in the x-axis.
So finding the centre is easy enough (x-2)^2 + (y-3)^2 = r^2
How do i find the radius though? If the point it passes through had the same x-value as the center then it would be a radius of 7. But it doesn't so how do i find this out?
Apparently the radius is square root of 50.