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anonymous
 5 years ago
x^2+8y=0 find the vertex focus and directrix
anonymous
 5 years ago
x^2+8y=0 find the vertex focus and directrix

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0All of these are straight formula vertex (b/2a, (4acb^2)/(4a)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0First you have to solve for y

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This is your goby:\[y=ax ^{2}+bx=c\]That is how you determine what a and b is in above formula. The formula in the previous post represent (h,k) the vertex. Sorry for all the alphabet soup. Don't get lost, stay with me.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0y didnt u use (xh)^2=4p(yk)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i know the answer to the problem i just dont understand how they got it

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the answer is (0,0) focus is (0,2) and the directrix is y=2 so how they get that

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0That is a valid method. If you don't understand that one. Try the one I posted above. It looks simpler to me.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0how do i do the above one when i have no a and b

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This is how you do it. I'll walk you through it. First solve for y. Put it in the form y=

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0OK, from the formula, write your a, b, c

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0u lost me how do i do that to me they not relating im real smart but sometimes u gotta talk 2 me like im slow

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I miswrote it the first time\[y=ax ^{2}+bx+c\]Your equation is\[y=(1/8)x ^{2}+0x+0\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok so thats used 2 find what

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok so is b and c the vertex points

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You choose your a, b, c. a=1/8, b=0, c=0. Put it in the formula {(0/2(1), [4(1)(0)0^2]/[4(1)]} which is (0,0). (h,k) is (0,0)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok so the long w u find the vertex and u use the other one to help find wast goes in the 1st formula correct???

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm sorry. I didn't get that.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the formula u wrote at the very 1st post is that the one i need to get the vertex but i formula to get the numbers that go in the first formula

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0dat made no sense lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok both formulas u gave me is that how i get the vertext??

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The vertex is two numbers (0,0) So the formula represent the two numbers.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i dont understand how you did that 1 st formula its 2 much going on wit all th () and {} [] like no how r u doing dat the vertex is (0,0) now explain to me where in the formula i get dat from cuz trying to solve that formula looks impossible

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0That is from the first formula, the first message in the post, but if you look at it long enough, you would notice your b=0, c=0, so quickly everything else ends up 0.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i said dat like 7 post ago ur b and c is ur h and k which is he vertex right??

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well not exactly. It just so happened that the zeros dominated, you could very well have a=1, b=2, c=3. That doesn't mean h=2, k=3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0uggggggggggggggghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh ok how do u get the focus point

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This might help http://www.youtube.com/watch?v=ZJf9shWlMz0

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ok can u start fresh with me step by step??

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm not up on all that. I just had that vertex info handy in a book I have around the house. Hang out at you Math lab at school.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0not bout 2 happen ill just give up but thanks
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