Notice that the bounds have flipped and the integrand is now negative.
Split this problem into a sum of two integrals:
Integral 1: Notice that the bounds shifted
units to the right... but so did the integrand: .
Integral 2: This integral represents a rectangular area with base:
and height: .
The bounds shifted
units to the right, but the integrand shifted units to the left.
We do not have enough information to evaluate this integral.