Question

Which expressions are polynomials? select each correct answer

Answer 1

Note:
A polynomial of order n is of the form
$f(x)=a_{n}x^{n}+a_{n-1}x^{n-1} + \, ..., \, +a_{1}x+a_{0}$
where the a's are constants.

Consider the given expressions.
x/5 + 2                  Not a polynomial
35x²                      It is a polynomial of order 2
7x⁷ - x⁵                  It is a polynomial of order 7
4x + √(x-1)             It is not a polynomial

Answer:
The polynomials are
35x²
7x⁷ - x⁵