The volume v in cubic feet of a shipping box is modeled by the polynomial function V (x) = x^3-2x^2-19x+20, where X is the length of the box. Explain how you know X equals - 2 is not zero

Step-by-step explanation:

The volume v in cubic feet of a shipping box is modeled by the polynomial function V (x) = x^3-2x^2-19x+20, where X is the length of the box. To determine if x = - 2 is not a zero of the polynomial function, we would substitute x = - 2 into the polynomial function, V (x) = x^3-2x^2-19x+20. If the result is not zero, it means that x = - 2 not a zero of the polynomial function. Therefore

(-2) ^3-2 (-2) ^2-19 (-2) + 20

= - 8 - 8 + 38 + 20 = 42

Since 42 is not equal to 0, then x = - 2 not a zero of the polynomial function.