# Chapter 4 - Polynomials - 4.7 Polynomials in Several Variables - 4.7 Exercise Set - Page 284: 42

$3a^2b-10ab^2$

#### Work Step by Step

Removing the grouping symbols and then combining like terms, the given expression, $(5a^2b-7ab^2)-(3a^2b+ab^2)+(a^2b-2ab^2) ,$ simplifies to \begin{array}{l}\require{cancel} 5a^2b-7ab^2-3a^2b-ab^2+a^2b-2ab^2 \\\\= (5a^2b-3a^2b+a^2b)+(-7ab^2-ab^2-2ab^2) \\\\= 3a^2b-10ab^2 .\end{array}

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.