The volume of the shipping box can be described using the equation: 8x^3+4x^2-24xin^3. Find the dimensions of the shipping box if x=3 inches. Show all your work! PLEASE HELP ME AND I NEED TO SHOW MY WORK.

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.