#### Answer

$(x-9)(x+2)$

#### Work Step by Step

We try to find factors of c in $x^2+bx+c$ that add to negative b,
In this case...
$x^2-7x-18$
$x^2-9x+2x-18$
$x(x-9)+2(x-9)$
$(x+2)(x-9)$

Published by
McDougal Littell

ISBN 10:
0618595414

ISBN 13:
978-0-61859-541-9

$(x-9)(x+2)$

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