#### Answer

Please see the graph.
$x=17.72, .28$

#### Work Step by Step

$x^2-18x+5=0$
$x=(-b±\sqrt {b^2-4ac})/2a$
$x=(-(-18)±\sqrt {(-18)^2-4*1*5})/2*1$
$x=(18±\sqrt {324-20})/2$
$x=(18±\sqrt {304})/2$
$x=(18±2\sqrt {76})/2$
$x=(9±\sqrt {76})$
$x=(9±8.72)$
$x=(9+8.72)$
$x=17.72$
$x=(9-8.72)$
$x=.28$