# Chapter 6 - Review: 17

(x+3y)(x+5y)

#### Work Step by Step

$x^{2}$+8xy+15$x^{2}$=$x^{2}$+5xy+3xy+15$y^{2}$= x(x+5y)+3y(x+5y)=(x+3y)(x+5y)

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