# Chapter P, Prerequisites - Section P.5 - Algebraic Expressions - P.5 Exercises - Page 36: 59

x$^2$-9y$^2$

#### Work Step by Step

(A+B)(A-B)=A$^2$-B$^2$ (x+3y)(x-3y) (x)$^2$-(3y)$^2$ x$^2$-9y$^2$

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