Using Double integrals: you will have to have z inside instead of one. Where z is equal to 1-x+2y. Then the limits would be the same for y " from y1=1-x to y2 = 1-x^2" and for x" x1= 0 to x2 = 1".
Hi, I checked my work and found out that everything is correct, except that part. It should be -xy since the integral of -x with respect to y is -xy. All the steps after that are correct. So, it was a typo by me. I am attaching a link to the detailed work for the inner integration: drive.google.com/file/d/1Y_Puie9jIWvwIMM7txLOZNGklJP7noKS/view?usp=sharing JaberTime
