Question 572582
the general equation for a circle is ___ (x - h)^2 + (y - k)^2 = r^2 ___ this is a circle centered at (h,k) with a radius of r


in this case, r is the distance between (4,-5) and (9,4)
___ by Pythagoras (the distance formula) ___ r^2 = (4 - 9)^2 + (-5 - 4)^2