I can't solve this problem:
We have A(x)= (x-1) (2-x) (6+2x)
a. For which prices of x, A(x)=0
b. Find the prices of x, to give A(x)= is not 0
c. Find the prices of x, to has A(x) a inverse/reverse.
I hope you understand this problem, and solve it.
I am not good in English.