Answer:
16 / (6x + 5)^2.
Step-by-step explanation:
Use the Quotient Rule
f'(x) = [ (6x + 5)*2 - (2x - 1)*6 ] / (6x + 5)^2
= (12x + 10 - 12x + 6) / (6x + 5)^2
= 16 / (6x + 5)^2.
