1. The problem statement, all variables and given/known data f(x) = x(x-5)^4 2. Relevant equations 3. The attempt at a solution I used product rule and chain rule so, 1(x-5)^4 + 4x(x-5)^3(1) The answer to this question is 5(x-5)^3(x-1). I left it like the answer above. I don't know how to expand (x-5)^4. Thanks.