I need help with this please
This expression does not factor.
The factors of 40 are 1 and 40, 2 and 20, 4 and 10, and 5 and 8.
Since the last term is -40, one of the factors must be positive and one must be negative.
|40-1| = 39
|20-2| = 18
|10-4| = 6
|5-8| = 3
Since none of those = -1, the express is "prime" and can't be factored.