Assignment:
Q1. When simplifying like terms, how do you determine the like terms?
Q2. How do you determine the common factors in an expression?
Q3. What is factoring by grouping? When factoring a trinomial by grouping, why is it necessary to write the trinomial in four terms?
Q4. What is a common factor? Where do you use the common factor in an expression consisting of various terms?
Provide complete and step by step solution for the question and show calculations and use formulas.