Factor completely x2 − 7x + 18

prime
(x − 9)(x − 2)
(x − 9)(x + 2)
(x + 9)(x + 2)

The factorization of the given expression is not possible.

         Hence, the option that holds true is:

                              Prime.

We are given a polynomial expression in terms of variable x as:

It is a prime expression.

Since we could not factorize our polynomial as the expression do not have any integer roots.

(

Since the roots of the equation is calculated by the quadratic formula:

)

so it could not be expressed as a product of two linear factors.

           Hence, the answer is:

                     Prime