I am stuck on this problem: Find the area of the region enclosed by the graph of x^2 + y^2 = 2x - 6y - 10x + 14y + 88.
I am stuck on this problem: Find the area of the region enclosed by the graph of x^2 + y^2 = 2x - 6y - 10x + 14y + 88.
x2 + y2 = 2x – 6y – 10x + 14y + 88
x2 + y2 + 8x – 8y = 88
(x2 + 8x ) + (y2 – 8y ) = 88
(x2 + 8x + 16) + (y2 – 8y + 16) = 88 + 16 + 16
(x + 4)2 + (y – 4)2 = 120
The equation of a circle is (x – h)2 + (y – k)2 = r2
where x and y locate the center, and r is the radius.
Area of a circle is π r2.
r2 of our circle is 120.
Area = 120 π
.