The width, if it is an area model is x^2-3
Given the function:
Get the factors of each term:
6x^2 = 6 * x * x
18 = 6 * 3
This shows that the GCF is 6, the expression becomes;
From the factor, we can see that the width, if it is an area model is x^2-3
Learn more on GCF here: https://brainly.com/question/219464