### Home > INT2 > Chapter 4 > Lesson 4.2.3 > Problem 4-85

4-85.

Factor each expression, if possible. Identify any special cases, such as a difference of squares or a perfect square trinomial.

This is a difference of squares.

Use an area model and a Diamond Problem.

Not factorable. Why?

What is special about the first and third terms?

See part (b).

See part (a).

Remember to factor completely.