### Home > PC3 > Chapter 1 > Lesson 1.1.6 > Problem 1-55

1-55.

Are the following pairs of expressions equivalent? Explain how you know using at least two different methods.

and

and

Try substituting values such as *, ,* 4 etc.

1-55.

Are the following pairs of expressions equivalent? Explain how you know using at least two different methods.

and

and

Try substituting values such as *, ,* 4 etc.