## Elementary Technical Mathematics

Published by Brooks Cole

# Chapter 5 - Review - Page 232: 21

#### Answer

$$10x^2-7x+4.$$

#### Work Step by Step

We simplify by distributing the negative and combining like terms as follows: $$(3x^2+5x+2)+(9x^2-6x-2)-(2x^2+6x-4)\\=10x^2-7x+4.$$

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