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Math Help - Please help! I kinda have the answer but Im not sure if its right

  1. #1
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    Please help! I kinda have the answer but Im not sure if its right

    For x3y2+y3x=-6, find dy/dx. I get an answer that is close to the right answer, but either my y is off by an exponent or something.
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  2. #2
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    What answer do you get ?
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  3. #3
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    -3x2y2-y3 / 3x2y+y3
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  4. #4
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    Re: Please help! I kinda have the answer but Im not sure if its right

    x^3y^2+y^3x=-6

    3x^2y^2+2x^3y y' +y^3+3xy^2 y'=0

    \frac{dy}{dx} = -\frac{3x^2y+ y^2}{2x^3+3xy}
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  5. #5
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    Okay but why didnt you make it like -3x2y2-y3 / 2x3y+3xy2
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  6. #6
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    Re.why

    when numerator and denominator have common factor, we can simplify the quotient.
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