Question

what is the name of this conic? :
4x^2 + 4y^2 + 16x - 24y + 8 = 0

Answer 1

Circle

Answer 2

thanks

Answer 3

Since the coefficients of x^2 and y^2 are the same

Answer 4

ok, and is this an ellipse:
x^2 + 9y^2 - 14x + 36y + 49 = 0

Answer 5

damn, myininaya you are GOOD at maths

Answer 6

it is an ellipse since the coefficients are not the same but both positive

Answer 7

ok thank you

Answer 8

whatever andruis Apparently I'm not that good since I can't figure out your problem

Answer 9

And there was no math involved here lol

Answer 10

:D, still, you are like 100 times better than me

Answer 11

how would you go about generating an equation for a parabola with diretrix x=6 and vertex (3,8) ??

Answer 12

brb i have to pee but the equation of parabola is f(x)=a(x-h)^2+k where (h,k) here =(3,8). So now all we have to find is a

Answer 13

whoa dude your aewsome

Answer 14

awesome* lol

Answer 15

honestly i never heard of a diretrix

Answer 16

i have to look it up

Answer 17

its "a fixed line" having to deal with a parabola, like the focus is a " fixed point"

Answer 18

ok. The equation y^2=4px is a parabola with focus (p,0) and directrix x=-p so...

Answer 19

omg wait

Answer 20

ok

Answer 21

i think im fixing to figure something out

Answer 22

thanks ive been out of school for weeks cuz i broke my arm my collar bone and my back lol so i havnt learned any of this

Answer 23

I think a is -1/24 since p=1/4a and p=-6 since the directrix is x=6

Answer 24

so I think the parabola is f(x)=-1/24(x-3)^2+8

Answer 25

thats great man i appreciate it

Answer 26

let me rewrite this so there is no confusion f(x)=-1*(x-3)^2/24+8

Answer 27

i'm not a man lol

Answer 28

oops my bad

Answer 29

I could be wrong though. you should check with someone else

Answer 30

alright well thanks anyway