If you would like to find a factor of 6x^2y + 8x^2 - 30y - 40, you can calculate this using the following steps:
6x^2y + 8x^2 - 30y - 40 = 2x^2 (3y + 4) - 10 (3y + 4) = (3y + 4) (2x^2 - 10) = 2 (3y + 4) * (x^2 - 5)
The correct result would be 3y + 4.
