Answer
$9x^3+18x^2$
Work Step by Step
A binomial is a polynomial with two terms.
To create a binomial with $9x^2$ as the GCF of its terms, you can multiply $9x^2 $ by any power of x to create one term and by any constant to create the other term.
For example, multiplying by x and by 2 gives the polynomial
$9x^3+18x^2$
