Answer
See graph
Work Step by Step
$$y=x^2+10x+20$$
$$y-20+25=x^2+10x+25$$
$$y+5=(x+5)^2$$
$$y=(x+5)^2-5$$
The vertex is (-5,-5).
Substitute 0 for x.
$$y=20$$
$$(0,20)$$
Substitute -1 for x.
$$y=11$$
$$(-1,11)$$
Plot these points and connect with a smooth curve.
