# Chapter 5 - Exponents and Polynomials - 5.2 - Multiplying Monomials - Problem Set 5.2 - Page 200: 7

$14x^{3}y$

#### Work Step by Step

Using $x^a\cdot x^b=x^{a+b}$, the given expression, $(-2x^2y)(-7x) ,$ simplifies to \begin{array}{l}\require{cancel} (-2)(-7)x^{2+1}y^{} \\\\= 14x^{3}y .\end{array}

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