Question

Graph the following equation. Begin by completing the square on the first two terms:
y=x^2+8x+5

Answer 1

\[x^2+8x+5=x^2+8x+16-9=(x+4)^2-9\]
Identify the vertex point, and you're pretty much set to graph.

Answer 2

How do I find the points? I'm trying to finish the quiz before I do the homework, so I have no idea how to do this, sorry lol

Answer 3

Heeeey, @Jack1 !! :)

Answer 4

haya cookie ;)

Answer 5

I need super help tonight, I'm trying to finish like 3 homeworks and a quiz tonight. I'm doing the quiz first :/

Answer 6

for this, i still do it the long way, solve your x intercepts, find ur turning point, and then pick a 3rd y value based on that, then connect the 5 points and ur there, im sure theres an easier way tho, probably to do with vertex point,

Answer 7

Sounds difficult lol I haven't done the homework for this chapter so I have no idea what to do

Answer 8

wow, gud luck, im just takin a 5 min breather, i have to finish another assignment b4 wednesday

Answer 9

ok, so have u done derivatives b4?

Answer 10

I have to finish all of my work by Tuesday! Finals are Wednesday >.<

Answer 11

uhhh, probably

Answer 12

damn... well, hang on... googling good website to explain better

Answer 13

sweet, got it:
http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

go here and look at the pics on this website

Answer 14

what @SithsAndGiggles was helping with before was putting the equation in vertex form, as that will easily give u the x and y coordinate of ur turning point

Answer 15

So I graph 4 -9?

Answer 16

Or something like that...

Answer 17

k sorry g2g cookie as i doan have much time but think it will look something like this:

hmmm... wait:
think @SithsAndGiggles made a little typo above , should proly be -11, not -9

Answer 18

\[\Large x^2+8x+5=x^2+8x+16-11=(x+4)^2-11\]
16 - 9 = 7
16 - 11 = 5
our original equation is for 5

Answer 19

so in vertex form:
\[\large y= a(x-h) +k\]\[ \large y =(x+4)^2-11\] so (-4) = h and (- 11) = k
so that's ur turning point

use quadratic formula to solve for x intercepts

then pick a point like y = 10 and solve for the 2 x points

now connect the dots and ur done :)