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sarah1017
Group Title
What is the standard form of the equation of an ellipse with foci at (+3,0) and covertices at (0,+5)?
Please show all steps!
 7 months ago
 7 months ago
sarah1017 Group Title
What is the standard form of the equation of an ellipse with foci at (+3,0) and covertices at (0,+5)? Please show all steps!
 7 months ago
 7 months ago

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ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
dw:1393563390845:dw
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
dw:1393563452971:dw
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
dw:1393563500603:dw
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
b = 5 a = ?
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
if u can find a, u can write the equation of ellipse : \(\large \frac{x^2}{a^2} + \frac{y^2}{b^2} = 1\)
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
any idea how to find "a" ? :)
 7 months ago

sarah1017 Group TitleBest ResponseYou've already chosen the best response.0
How do I find a? Is there a formula I have to follow?
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
u just need to knw how to find an unknown side in a right triangle
 7 months ago

sleung Group TitleBest ResponseYou've already chosen the best response.1
Use the pythagorean theorem.
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
dw:1393563687257:dw
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
a^2 = b^2 + c^2 a^2 = 5^2 + 3^2
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
simplify
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
yes, you want "a" right ?
 7 months ago

sarah1017 Group TitleBest ResponseYou've already chosen the best response.0
Yes. So do I divide 34 by 2?
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
noo, you need to take "square ROOT" both sides
 7 months ago

sleung Group TitleBest ResponseYou've already chosen the best response.1
So \[a=\sqrt{34}\]
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
actually im wrong, a^2 is enough as u put it earlier,,,, i see we dont need to find a .
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
directly plugin a^2 value in the equation
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
\(\large \frac{x^2}{34} + \frac{y^2}{25} = 1\)
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
^^final equation of ellipse
 7 months ago

sarah1017 Group TitleBest ResponseYou've already chosen the best response.0
Whoaaa that confused me. So that's the final equation, is the work we did before still correct? Well except the finding a parts?
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
everything is correct, you could even find "a", and plugin the "a" value back into the equaiton
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
but thats just extra unnecessary work
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
when u knw that u will be needing oly "a^2", why to find "a" ?
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
it wont be a mistake to find "a", its just pain to take square root of 34 lol.. .hope u get me :)
 7 months ago

sarah1017 Group TitleBest ResponseYou've already chosen the best response.0
I wasn't too sure how to do this at first so I just went with ya lol. I get it though. Thanks for your help :)
 7 months ago

ganeshie8 Group TitleBest ResponseYou've already chosen the best response.3
np :) u wlc :))
 7 months ago
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