# Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set: 112

$5x^{2}+3x-4$

#### Work Step by Step

We are given that $P(x)=3x+3$ and $R(x)=5x^{2}-7$. $R(x)+P(x)=(5x^{2}-7)+(3x+3)$ Combine like terms. $5x^{2}+3x+(-7+3)=5x^{2}+3x-4$

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