#### Answer

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

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

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

(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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