We will find this area by integrating with respect to y. The integrand is obtained by taking the right-hand function minus the left-hand function, or
Step 3
The limits on the integral are the y-values where the curves intersect.
Equating 6 - 6y^2 = 6y^2 - 6, we find that the two solutions are y1 = -1 and y2 = 1.
Step 4
Now, the area is given by
integral from -1 to 1 [(6 - 6y^2) - (6y^2 - 6)] dy = integral from -1 to 1 (-12y^2 + 12) dy.
Step 5
We have
integral from -1 to 1 (12 - 12y^2) dy
Performing this operation and simplifying fully gives us the exact area of the region.