## Algebra: A Combined Approach (4th Edition)

Published by Pearson

# Chapter 6 - Section 6.4 - Factoring Trinomials of the Form ax2+bx+c by Grouping - Exercise Set: 55

#### Answer

81$z^{2}$-25

#### Work Step by Step

(9z+5)(9z-5)=$(9z)^{2}$-$5^{2}$=81$z^{2}$-25

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