要详细不走,每一个问号填一个数字或者式子

要详细不走,每一个问号填一个数字或者式子
find the gradient of the curve y=(x-1)(x-2) dy/dx=?
at the point where x=7 at x=7
find the points on the curve
y=x(x-1)(x-2) dy/dx=?=11
which have the same gradient =0
=0
=0
x=?or
Points are :( ,) and ( ,)