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anonymous

  • 4 years ago

Def Eq Solve: (2xy+x)dx+(x^2+y)dy=0

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  1. anonymous
    • 4 years ago
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    2xy dx+x^2 dy + xdx+ydy=0 Observe that dervative of x^2 y=2xydx+x^2dy(The first two terms) d(x^2 y) + xdx+ydy=0 integrate x^2y+(x^2+y^2)/2=0

  2. anonymous
    • 4 years ago
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    Omg why are you so fast at this xD Im still pretty lost though on this

  3. anonymous
    • 4 years ago
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    lol. integral of dx=x so integral of d(x^2 y) is also x^2 y.

  4. anonymous
    • 4 years ago
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    well not exactly this problem but other ones where you may not be able to observe that? or will there always be something like that

  5. anonymous
    • 4 years ago
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    Well there are some standard stuff like xdy-ydx/x^2=d(x/y) and all.

  6. anonymous
    • 4 years ago
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    yea is there another way you could possibly show it assuming I will most likely not see that while I'm doing my test xD

  7. anonymous
    • 4 years ago
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    Just learn the standard results for the test its not very hard to identify, all equation are always solvable.

  8. anonymous
    • 4 years ago
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    I can do that a lot with calc but for some reason DE is just not sinking in at all... lol

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