Squaring algebraic expressions and applying the distributive property is pretty straightforward but something about calculus is throwing me off:
(x + dx)^2 = x^2 + 2x * dx + (dx)^2
I keep ending up with the following:
(x^2 + 2x) * (dx^2 + (dx)^2.)
Thrown for a ~loop here.
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this but with p = x, q = dx. can you explain how you're getting the second expression and specifically what "dx^2" means?
