# Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Special Cases - Mixed Review - Page 497: 64

$5x^{2}+53x+72$

#### Work Step by Step

Simplify: $(x+9)(5x+8)$ Use foil $(x\times5x)+(x\times8)+(9\times5x)+(9\times8)$ Simplify $5x^{2}+8x+45x+72$ Simplify $5x^{2}+53x+72$

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