## Elementary Technical Mathematics

Published by Brooks Cole

# Chapter 6 - Cumulative Review - Page 265: 17

#### Answer

$$20x^2-7xy-6y^2.$$

#### Work Step by Step

We simplify by distributing and then combine similar terms as follows: $$(4x - 3y)(5x + 2y)=20x^2+8xy-15xy-6y^2\\ =20x^2-7xy-6y^2.$$

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