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anonymous

  • 5 years ago

what is the name of this conic? : 4x^2 + 4y^2 + 16x - 24y + 8 = 0

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  1. myininaya
    • 5 years ago
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    Circle

  2. anonymous
    • 5 years ago
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    thanks

  3. myininaya
    • 5 years ago
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    Since the coefficients of x^2 and y^2 are the same

  4. anonymous
    • 5 years ago
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    ok, and is this an ellipse: x^2 + 9y^2 - 14x + 36y + 49 = 0

  5. anonymous
    • 5 years ago
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    damn, myininaya you are GOOD at maths

  6. myininaya
    • 5 years ago
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    it is an ellipse since the coefficients are not the same but both positive

  7. anonymous
    • 5 years ago
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    ok thank you

  8. myininaya
    • 5 years ago
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    whatever andruis Apparently I'm not that good since I can't figure out your problem

  9. myininaya
    • 5 years ago
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    And there was no math involved here lol

  10. anonymous
    • 5 years ago
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    :D, still, you are like 100 times better than me

  11. anonymous
    • 5 years ago
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    how would you go about generating an equation for a parabola with diretrix x=6 and vertex (3,8) ??

  12. myininaya
    • 5 years ago
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    brb i have to pee but the equation of parabola is f(x)=a(x-h)^2+k where (h,k) here =(3,8). So now all we have to find is a

  13. anonymous
    • 5 years ago
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    whoa dude your aewsome

  14. anonymous
    • 5 years ago
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    awesome* lol

  15. myininaya
    • 5 years ago
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    honestly i never heard of a diretrix

  16. myininaya
    • 5 years ago
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    i have to look it up

  17. anonymous
    • 5 years ago
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    its "a fixed line" having to deal with a parabola, like the focus is a " fixed point"

  18. myininaya
    • 5 years ago
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    ok. The equation y^2=4px is a parabola with focus (p,0) and directrix x=-p so...

  19. myininaya
    • 5 years ago
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    omg wait

  20. anonymous
    • 5 years ago
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    ok

  21. myininaya
    • 5 years ago
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    i think im fixing to figure something out

  22. anonymous
    • 5 years ago
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    thanks ive been out of school for weeks cuz i broke my arm my collar bone and my back lol so i havnt learned any of this

  23. myininaya
    • 5 years ago
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    I think a is -1/24 since p=1/4a and p=-6 since the directrix is x=6

  24. myininaya
    • 5 years ago
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    so I think the parabola is f(x)=-1/24(x-3)^2+8

  25. anonymous
    • 5 years ago
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    thats great man i appreciate it

  26. myininaya
    • 5 years ago
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    let me rewrite this so there is no confusion f(x)=-1*(x-3)^2/24+8

  27. myininaya
    • 5 years ago
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    i'm not a man lol

  28. anonymous
    • 5 years ago
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    oops my bad

  29. myininaya
    • 5 years ago
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    I could be wrong though. you should check with someone else

  30. anonymous
    • 5 years ago
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    alright well thanks anyway

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