### Home > INT2 > Chapter 4 > Lesson 4.1.3 > Problem 4-28

4-28.

Factor the following expressions, if possible.

Use an area model and a Diamond Problem.

Insert a

between the and the .

The expressions in parts (a) through (c) are trinomials while part (d) is a binomial, yet they are all quadratic expressions. What makes each of them a quadratic? Justify your responses.

What is the highest power of the variable in each of the problems?