derivative of functions

Question

derivative of y= (9-x^2)(2x)

Answer 1

y = (9-x^2)(2x)

y = 18x-2x^3

Apply derivative to each sides with respect of x.

d/dx (f(x)) = d/dx(18x-2x^3)

 = d/dx18x-d/dx2x^3

= 18-6x^2