# How do you simplify (-b²)(-b³ )(-b^4) leaving only positive exponents?

Apr 28, 2017

See the solution process below:

#### Explanation:

Use this rule of exponents to simplify this expression:

${x}^{\textcolor{red}{a}} \times {x}^{\textcolor{b l u e}{b}} = {x}^{\textcolor{red}{a} + \textcolor{b l u e}{b}}$

$\left(- {b}^{\textcolor{red}{2}}\right) \left(- {b}^{\textcolor{b l u e}{3}}\right) \left(- {b}^{\textcolor{g r e e n}{4}}\right) = - {b}^{\textcolor{red}{2} + \textcolor{b l u e}{3} + \textcolor{g r e e n}{4}} = - {b}^{9}$