# If #(x-y)^3 = A(x + y)#, how do you prove that #(2x + y)dy/dx = x + 2y#?

##### 1 Answer

May 5, 2015

If

Before differentiating, let's isolate the constant

Now, use the quotient rule to differentiate implicitly:

Clearly we do not need the denominator, and to minimize notation,

let us use

Now divide all by

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