# Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1 - Page 347: 43

-3$x^{2}$

#### Work Step by Step

5$x^{2}$ - 8$x^{2}$ = (5-8)$x^{2}$ (combine like terms) =-3$x^{2}$

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