# Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set: 71

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#### Work Step by Step

We are given the expression $(7x^{2}-5)+(-3x^{2}-2)-(4x^{2}-7)$. To subtract the third term from the first two, we can add the opposite of the third term. $(7x^{2}-5)+(-3x^{2}-2)+(-4x^{2}+7)$ Next, we can combine like terms. $(7x^{2}-3x^{2}-4x^{2})+(-5-2+7)=0$

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