Answer
$2ab^2+ab$
Work Step by Step
The distributive property states that for any real numbers $a, b$, and $c$,
$a(b+c) = ab + ac$
Combine like terms using the distributive property to obtain:
$=2ab^2+(10ab-9ab)
\\=2ab^2+(10-9)ab
\\=2ab^2+1(ab)
\\=2ab^2+ab$
