#### Answer

$x=\pm 3\sqrt 2 -3$

#### Work Step by Step

$x^2+6x-9=0$
$x^2+6x+9=18$
$(x+3)^2=18$
$x+3=\pm \sqrt 18$
$x+3=\pm 3\sqrt 2$
$x=\pm 3\sqrt 2 -3$

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Published by
Prentice Hall

ISBN 10:
0133281140

ISBN 13:
978-0-13328-114-9

$x=\pm 3\sqrt 2 -3$

$x^2+6x-9=0$
$x^2+6x+9=18$
$(x+3)^2=18$
$x+3=\pm \sqrt 18$
$x+3=\pm 3\sqrt 2$
$x=\pm 3\sqrt 2 -3$

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