# Chapter 4 - Polynomials - Review Exercises: Chapter 4: 16

$18x^{5}$

#### Work Step by Step

Using the laws of exponents, the given expression, $(2x^3)(-3x)^2 ,$ simplifies to \begin{array}{l}\require{cancel} (2x^3)(-3)^2x^2 \\\\= (2x^3)9x^2 \\\\= 18x^{3+2} \\\\= 18x^{5} .\end{array}

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