Final Answer
Step-by-step Solution
Specify the solving method
Apply the product rule for differentiation: $(f\cdot g)'=f'\cdot g+f\cdot g'$, where $f=x+1$ and $g=x-4$
The derivative of a sum of two or more functions is the sum of the derivatives of each function
The derivative of a sum of two or more functions is the sum of the derivatives of each function
The derivative of the constant function ($1$) is equal to zero
The derivative of the constant function ($-4$) is equal to zero
The derivative of the linear function is equal to $1$
The derivative of the linear function is equal to $1$