Find the area of the region satisfying the inequality x^2 + y^2 <= 4x + 6y + 13 - 2x + 10y + 15.
= x ^2 -2x + y^2 -16y <= 28 complete the square for x and y
(x-1)^2 + (y-8)^2 <= 28 +1 + 64
THIS IS A CIRCLE WHERE r^2 = 93 area = 93pi
+36916 
