## Algebra 1

Published by Prentice Hall

# Chapter 8 - Polynomials and Factoring - 8-8 Factoring by Grouping - Practice and Problem-Solving Exercises - Page 520: 40

#### Answer

$7x; 9x^{2} - 4$

#### Work Step by Step

$63x^{3} - 28x$ We see that that two terms have a 7x common so we can factor it out of the two terms $7x(9x^{2} - 4)$ Since the Area of a square is length x length, the length could be either 7x or $9x^{2} - 4$

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