### Home > CCA2 > Chapter 3 > Lesson 3.2.4 > Problem 3-102

3-102.

Estacia wants to learn more about excluded values.

Explain to Estacia why

cannot bein the expression . What happens when you substitute

for ?does not work here because it makes the expression undefined since dividing by is not possible. Find the excluded values of

in each of the expressions of problem 3-99.What values make the denominator equal to

? These are known as excluded values. Create an expression that has the excluded values of

and. Be prepared to share your expression to the class. Answers vary. Make sure that these two values make the denominator equal to

.