# Chapter 8 - Polynomials and Factoring - 8-2 Multiplying and Factoring - Practice and Problem-Solving Exercises - Page 496: 44

12 is co-efficient of $x^{2}$

#### Work Step by Step

4x(5$x^{2}$+3x+7) (4x$\times$5$x^{2}$)+(4x$\times$3x)+(4x$\times$7) 20$x^{3}$+12$x^{2}$+28x The co-efficient of $x^{2}$ is the number that goes with it which is 12.

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