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anonymous
 5 years ago
Which of the following equations describes an ellipses?
a) 25x^(2)+16y^(2)50x96y231=0
b) 9x^(2)+y^(2)+54x2y+73=0
c) 16x^(2)+25y^(2)64x150y111=0
d) 25x^(2)+9y^(2)72y81=0
e) 4y^(2)x^(2)32y4y+56=0
anonymous
 5 years ago
Which of the following equations describes an ellipses? a) 25x^(2)+16y^(2)50x96y231=0 b) 9x^(2)+y^(2)+54x2y+73=0 c) 16x^(2)+25y^(2)64x150y111=0 d) 25x^(2)+9y^(2)72y81=0 e) 4y^(2)x^(2)32y4y+56=0

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0*there can be more than one answer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if ab>0, the equation is an ellipse

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0where a is the coeff of x^2 and b the coeff of y^2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I know it is an ellipse, but which equation describes it?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i said calculate ab for every case

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and then when ab is negative..its an ellipse

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so only e) is an ellipse

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0wouldn't e add up to a possitive though?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i didnt tell u to add..multiply a and b

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0or do you not go by the result of the two, but the fact that one of the factors is negative

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0nvm i got it. thank you.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0in e) a x b is negative
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