how to find the quadratic equation that has the vertex (-2,5) and whose graph passes through the point (0,9)

Question

anonymous · Answer

$$f(x)=a(x-h)^{2}+k$$
you know this formula right?

anonymous · Answer

haha nope slept through it... haha yea...

anonymous · Answer

read you class notes!! but plug in your vertex so you get
$$f(x)=a(x+2)^{2}+5$$
so far so good?

anonymous · Answer

haha dude he talk most the time and his notes are all over the place, and how i take notes while sleeping??

anonymous · Answer

oh and i had a game on that day too XD sooooo yea..

anonymous · Answer

but still did you understand?

anonymous · Answer

yea i get the vertex but how you know if it pass through the lines that was given??

anonymous · Answer

then yu plug in the point.
$$9=a(0+2)^{2}+5$$

anonymous · Answer

oh okay. then you solve??? but solve for what?

anonymous · Answer

solve for a

anonymous · Answer

okay i got one and what you do with the answer??

anonymous · Answer

plug in yur a,h, and k values.

anonymous · Answer

ummmmm what??? it'll just be the same rifht?? f(x)=(x+2)^3+5?

anonymous · Answer

*right need my auto correct haha

anonymous · Answer

nope. its not a 3. its a 2 but yeah thats pretty much it.

anonymous · Answer

sorry that was bad typing skills...

anonymous · Answer

haha noticed.

anonymous · Answer

im doing chem while doing math... so yea... and my mom watching corny asian drama and the flirting hella stupid...

anonymous · Answer

haha how nice... did yu understand the answer tho?

anonymous · Answer

haha okay, and yes i got it. haha im super sleepy... need to finish homework... haha you start on chem dont forget

anonymous · Answer

haha finish yurs. ima start in the morning.

anonymous · Answer

haha yea i gotta catch up on apush im still on chap 8 TT.TT sad...

anonymous · Answer

haha then? why yu here? haha finish! haha jkjk