Asked by Jake UCD 11/5/11

Find the slope of the tangent line to the curve
2(x^2 + y^2)^2 = 25(x^2 - y^2) at the point (3,1).

Thank you very much for your help.
Answered by bobpursley
take the derivative of each side..

4(x^2+y^2)(2x+2yy')=...

collect the y' terms.
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