Question 868034
So you can use the power rule which is easier, if ur tutor doesnt want u to show all work. using the formula like the other guys.

{{{x^n = nx^(n-1)}}}

so

{{{12t-4t^2}}}

{{{12(d/dx) -(4x2t^(2-1)) = 12-8t}}}

Heaps easier!!!