we have
3x^4 - 5x^3 + 9x + 14
Find the zeros of the function
REmember that the zeros of the function are the values of x when the value of the function is equal to zero
so
equate to zero the given expression
3x^4 - 5x^3 + 9x + 14=0
using a graphing tool
see the attached figure
The function has no real solutions
therefore
It's not possible to express the width of the expression as (x + 2)