Question

The Polynomial f(x)=x^3+10x^2+mx-n,where m and n are constants,is divisible by x+3.When f(x) is divided by x-1,the remainders is 40.
(a) Find the value of m and n.
(b) Someone said that all the roots of f(x)=0 are rational number, do you agree?

Answer 1

This is the answer n=-45&m=-6
B no