I have attached a question which i kind of confused with. I understand the differentiation parts but i don't understand the simplifying bits.
The main simplification bit i don't understand is the 12x^2 -4x bit which i have circled in the attached image. I think that the 12x^2 -4x bit comes from the simplifying (squareroot 3x-1) * 2x but i not sure and if it does i don't understand this simplification on how it was done.
I would greatly appreichate any help in solving this problem.