(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find all points on the curve 2x^3 + 2y^3 -9xy= 0 where you will have a horizontal and vertical tangent lines.

2. Relevant equations

2x^3 + 2y^3 -9xy= 0

3. The attempt at a solution

6x^2+6y^2dy/dx - (9y +9x dy/dx)=0

6x^2 + 6y^2dy/dx - 9y -9x dy/dx=0

6y^2dy/dx-9xdy/dx=9y-6x^2

dy/dx= (9y-6x^2)/(6y^2-9x)

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# CAlculus help please

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