# Chapter 5 - Mid-Chapter Check Point - Page 378: 19

10x$^7$-5x$^4$+8x$^3$-4

#### Work Step by Step

(5x$^4$+4)(2x$^3$-1) 5x$^4$(2x$^3$)+5x$^4$(-1)+4(2x$^3$)+4(-1) 10x$^7$-5x$^4$+8x$^3$-4

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