(3).(12 points) Evaluate the integral
dxdy, where D is the trapezoidal region with vertices (1,0), (2,0), (-1,-1) and (-2,-2).
(3).(12 points) Evaluate the integral
dxdy, where D is the trapezoidal region with vertices (1,0), (2,0), (-1,-1) and (-2,-2).