### Home > PCT > Chapter Ch9 > Lesson 9.1.4 > Problem 9-56

9-56.

Compute the following limits using either algebra or your calculator. Homework Help ✎

when *f*(*x*) = 3*x*− 4.when *g*(*x*) =*.*

Substitute 3 in for *x*.

You can do that because you do not have division by zero.

Do NOT substitute 2 in for '*x*' yet or you will have division by zero problem. Factor first, eliminating this problem. Then substitute 2 in for '*x*'.