The binomial is a factor of the polynomial.
Explanation:
If a polynomial is divided by a binomial and the remainder is 0.
Then the binomial is a factor of the polynomial.
If a polynomial g(x) is divided by (x-a) ,it gives g(a) as remainder
Then g(x) = (x-a) Q(x) + g(a)
Hera g(a) = 0
So, g(x) = (x-a) Q(x)
It shows that (x-a) is a factor of g(x)