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Math Help - Find the center, vertex and foci

  1. #1
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    Find the center, vertex and foci

    Question : Put the equation 4x^2 + 9y^2 = 36 in the standard form and sketch it. Indicate its center, vertex and foci

    Solution :

    I am getting a ellipse equation \frac{x^2}{4} + \frac{y^2}{4} = 1
    and the e = 0
    since the value of b and a are both the same i dont know how to plt the graph which one should i take as the major and minor axis
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  2. #2
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    Quote Originally Posted by zorro View Post
    Question : Put the equation 4x^2 + 9y^2 = 36 in the standard form and sketch it. Indicate its center, vertex and foci

    Solution :

    I am getting a ellipse equation \frac{x^2}{4} + \frac{y^2}{4} = 1
    and the e = 0
    since the value of b and a are both the same i dont know how to plt the graph which one should i take as the major and minor axis
    This is incorrect. If you divide both sides by 36, you will get

    \frac{x^2}{9} + \frac{y^2}{4} = 1.
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    sorry typo mistake !!!!!

    so now the e = 0

    what should i do
    since fucus (ae,0) and since e=0 then ae = 0
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