Chapter P, Prerequisites - Section P.5 - Algebraic Expressions - P.5 Exercises - Page 35: 13

Type: polynomial Terms: x, -x$^2$, x$^3$, -x$^4$ Degree: 4

This expression is a polynomial because it has more than 3 terms. The terms are x, -x$^2$, x$^3$, -x$^4$. The degree of the polynomial is 4 because that is the highest power of any of the terms which in this case is -x$^4$.