Final answer:
The expression 5D^2+11d as given is not factorizable as there are no common factors between the terms. For further assistance, the original expression needs to be accurate and possibly a quadratic expression with a third term.
Step-by-step explanation:
The expression given in the student's question, 5D^2+11d, cannot be factored under common factoring rules, since there are no common factors between 5D^2 and 11d. However, if there's a typo in the original problem and it should be a quadratic equation like 5D^2 + 11D + c, then we could attempt to factor it by looking for two numbers that multiply to give 5c (where c is the third term in the quadratic) and add to give 11. Without the value of c, we cannot fully factorize the expression.
If the original expression is correct as given, then it just remains 5D^2+11d, which is not further factorizable with the information provided. In cases related to equation solving or factoring, accuracy in the given expression is crucial for proper assistance.