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mskyeg
Group Title
What are the foci of the ellipse? Graph the ellipse.
18x^2 + 36y^2 = 648
 one year ago
 one year ago
mskyeg Group Title
What are the foci of the ellipse? Graph the ellipse. 18x^2 + 36y^2 = 648
 one year ago
 one year ago

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Mertsj Group TitleBest ResponseYou've already chosen the best response.2
Get the equation into the right form by dividing both sides by 648
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
I did that im stuck at x^2/36 + y^2/18 = 1
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
Is the big number under the x or under the y?
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
That tells you that the major axis is horizontal so the vertices and foci are on the x axis and that a^2 = 36. Are you with me?
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
Yep. So find c
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
like wats the equation
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
do you mean "what is the question"?
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
i said equation
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
Do you mean what equation relates a, b, and c?
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
a^2b^2=c^2
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
not an option
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
dw:1363368768837:dw
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
Can you find C or are we done???
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
found it thanx
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
What is it?
 one year ago

mskyeg Group TitleBest ResponseYou've already chosen the best response.0
3 next to the square root of 2. dont knw how to write that in the chat box
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
3sqrt2 and 3sqrt2
 one year ago

Mertsj Group TitleBest ResponseYou've already chosen the best response.2
So the focal points are (3sqrt2,0) and (3sqrt2,0)
 one year ago
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