Question

f(x) =\displaystyle \frac{\left(7x-6\right)^{3}}{\left(6x+5\right)^{4}}. Find f'(x).

Answer 1

I already tried \[(6x+5)^4+d/dx(7x-6)^3 -(7x-6)^3 d/dx(6x+5)^4)/((6x+5)^4)^2\]

Answer 2

and when I did that I got \[(6x+5)^4+(7^3)-(7x-6)^3(6)^4)/(6x+5)^8\]

Answer 3

(and it was wrong) obviously. lol. So I could really use some help on figuring this out. I used the chain rule and the quotient rule...