Question 855953
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
f(x)=x^2+8x+7 = (x+4)^2 - 16 + 7 = (x+4)^2 -9
f(x)= 1(x+4)^2 -9  Parabola opening Upward 1 > 0, V(-4,-9)
Lineof Symmetry x = -4, P(0,7)& (-8,7) on Parabola
{{{drawing(300,300,   -10, 6, -10, 10, grid(1), blue(line(-4,50,-4,-10)) ,
circle(0, 7,0.2),
circle(-4, -9,0.2),
circle(-8, 7,0.2),

graph( 300, 300, -10, 6, -10, 10,0,(x+4)^2 -9 ) )}}}