#### Answer

$$(x+4)(x+1)$$

#### Work Step by Step

Factor
$$x^{2}+5x+4.$$
Find numbers that are factors of $4$ and sum to $5$:
$$(4)(1)=4;\space 4+1=5.$$
The polynomial is a product of two binomials:
$$x^{2}+5x+4=(x+4)(x+1).$$

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

$$(x+4)(x+1)$$

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