I get something quite different for the second derivative. Please reply showing your steps. Thank you!
Find the inflection points of (x+2)(x-4)^2
i found the second derivative which is very long
2(x-4)2(x-4)(x+2)+(x-4)^(2)*2(x+2)+2(x-4)=0
I got one inflection point which is 4 but there must be others cause my online hw says its wrong