The derivative of a constant times a function is the constant times the derivative of the function.
Let .
Apply the power rule: goes to
Then, apply the chain rule. Multiply by :
Differentiate term by term:
Apply the power rule: goes to
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: goes to
So, the result is:
The result is:
The result of the chain rule is:
So, the result is:
Now simplify:
The answer is:
-6*(-6 - 2*x) ------------- 2 / 2 \ \x + 6*x/
/ 2\ | 4*(3 + x) | 12*|1 - ----------| \ x*(6 + x) / ------------------- 2 2 x *(6 + x)