differentiation product rule

[sage rover]

so confused how my final answer isn't correct (actual answer is written in pencil on the corner)

[rare cove]

ur answer is correct but can be factorised further

[sage rover]

oh

[rare cove]

if you factorise (1 + 3x)^4 from both terms there

[sage rover]

how do i factorise it further

yeah..

[rare cove]

start with the first term

[sage rover]

hang on

[rare cove]

factorise (1 + 3x)^4

whats left

[sage rover]

something like this?

[rare cove]

yeah

and that gets u to the answer

[sage rover]

ohhh i get it now