The expression 40x+20y+55 cannot be factored further as there are no common factors or terms that allow for factoring by grouping.
Step-by-step explanation:
The expression 40x+20y+55 cannot be factored into simpler polynomials over the integers because there are no common factors among the terms other than 1, and no variable terms are repeated for factoring by grouping. Therefore, the expression is already at its simplest form and cannot be factored further.