## Algebra 2 Common Core

$a + 2b$
We begin by distributing: $-(a+2b)+4(a+2b)-2(a+2b)$ =$-a-2b+4a+8b-2a-4b$ Then we simplify by combining like terms. To combine like terms, simply add the coefficients of like variables: $-a-2b+4a+8b-2a-4b$ =$a + 2b$