# What is the degree of the polynomial x^5 + 1 - 3x^4 + 3x^9 - 2x?

This expresion has unknown x raised to the 5th, 4th, 9th and 1st power $\left(x = {x}^{1}\right)$ with coeficients of : 1,-3,+3 and -2 respectively. So the highest power (i.e. the degree of the polynomial) is 9.