Find the area of the region satisfying the inequality x^2 + y^2 <= 4x + 6y + 13 - 2x + 8y.
The shaded area looks like a circle.
Complete the square normally as if the "<=" was an "=" to get the equation in the form (x-h)^2 + (y-k)^2 = r^2.
Then find the area of the circle using r^2.
=^._.^=
