### Home > CCA2 > Chapter 12 > Lesson 12.1.1 > Problem12-22

12-22.

Expand. Homework Help ✎

1. $(a+b)^3$

Review the Math Notes on the Binomial Theorem in lesson 10.3.1. Remember, you can also use Pascal's Triangle to help you here.

$(a+b)^3=_3$$C_3a^3b^0+_3$$C_2a^2b^1+_3$$C_1a^1b^2+_3$$C_0a^0b^3$

$a^3+3a^2b+3ab^2+b^3$

2. $(2m + 5)^3$

Use the result of part (a). $a = 2m$; $b = 5$. Simplify.