Question

determine whether each expression is a polynomial
1. f(x)=3x+4/5x^3-7
2. g(x)=-5x^3+x-3/x
3. h(x)=x^3sqrt5+x-3
4. k(x)=25x^2-x^3+x^5

Answer 1

4.

Answer 2

see ax^n+bx^(n-1)+...+ x^0 this form is polynomial