Answer
$$(x+5)(x-1)$$
Work Step by Step
Find the factors of $-5$ that sum to $4$, in this case $5$ and $-1$:
$$x^2+4x-5=(x+5)(x-1)$$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter R - Algebra Reference - R.1 Polynomials - R.2 Exercises - Page R-7: 6
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