# Chapter 4 - Section 4.2 - Adding and Subtracting Polynomials - 4.2 Exercises: 28

$\text{Kind: }\text{ monomial }\\\text{Degree: } 3+1=4$

#### Work Step by Step

The given polynomial expression, $-a^3b ,$ has the following characteristics: \begin{array}{l}\require{cancel} \text{Kind: }\text{ monomial }\\\text{Degree: } 3+1=4 .\end{array}

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