Question

Which ones? can someone help me(?)

Answer 1

Answer:

Step-by-step explanation:

First, what's a polynomial?  It's an algebraic expression whose only independent variable is x, and in which all the x powers are either zero or positive and are integers:  x^3, x^2, x^1, x^0 (for example).

Looking at possible answer choice A, we immediately reject this because that power of x is in the denominator, representing 2x^(-3).  This negative power of x is not allowed.  Reject A.

In B, we have the powers x^2, x^1 and x^0.  Great.  This is a polynomial.

In C, we have x^2 + 1 in the denominator of the final fraction.  Reject this because of the final term.

In D, we have x^2 + 2x + √