Compute the differential dy for y=−9x^6−9x4

Question

Compute the differential dy for y=−9x^6−9x^4

dy = ?

Answer 1

Take the derivative of both sides:

dy/dx = -54*x^5-36*x^3.

Now, "multiply" both sides by dx:

dy = (-54*x^5-36*x^3)dx.