Answer
$ 5x^{2}+53x+72 $
Work Step by Step
Simplify:
$ (x+9)(5x+8) $
Use foil
$ (x\times5x)+(x\times8)+(9\times5x)+(9\times8) $
Simplify
$ 5x^{2}+8x+45x+72 $
Simplify
$ 5x^{2}+53x+72 $
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - 8-4 Multiplying Special Cases - Mixed Review - Page 497: 64
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