How to subtract a trinomial from a polynomial

The video tutorial explains how to simplify polynomial expressions by identifying and combining like terms. It introduces the concept of like terms, which have the same base and exponent, and demonstrates how to convert subtraction problems into addition problems using the distributive property. The tutorial concludes with a step-by-step process of combining like terms to achieve a simplified expression.

Explain the process of distributing a negative sign in an expression.

What is the final simplified answer when combining D^2, -D, and 5 - 5?