- #1

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## Homework Statement

## The Attempt at a Solution

When the textbook says: Differentiating both sides of x^3 + y^3 = 6xy with respect to x, regarding y as a function of x, and using the Chain Rule on the y^3 term and the Product Rule on the 6xy term, we get

I really don't get what they're saying. I understand chain rule and product rule, but where the y' and the 6xy comes from I don't know.