See question in image.
Please show workings .

see explanation

Step-by-step explanation:

Given f(x) then the derivative f'(x) from first principles is

f'(x) = lim ( h tends to 0 )

      = lim ( h to 0 )

      = lim ( h to 0 )

      = lim ( h to 0 )

      = lim ( h to 0 )

      = lim ( h to 0 ) ← cancel h on numerator/ denominator

      = lim ( h to 0 ) 9x²+9xh+3h² ← let h go to zero

f'(x) = 9x²

d

gimmee one of those gold crowns!

~coco