### Home > CCA2 > Chapter 10 > Lesson 10.3.1 > Problem 10-157

10-157.

Use the pattern for (*a* + *b*)^{4} to expand (3*x* + 1)^{4}. Homework Help ✎

Recall Pascal's Triangle and the expanded form of (*a* + *b*)^{4}.

Substitute 3*x* for *a* and 1 for *b*.

81*x*^{4} + 108*x*^{3} + 54*x*^{2} + 12*x* + 1