Consider the area between the graphs x + 2y = 0 and x + 8 = y². This area can be computed in two different ways using integrals. First of all, it can be computed as the sum of two integrals:
∫ f(x) dx + ∫ g(x) dx
where f(x) and g(x) are functions.
Alternatively, this area can be computed as a single integral:
∫ h(y) dy
where h(y) is a function. Either way, we find that the area is...