Question

X square + 2 X + 1 is a polynomial

in which variable​

Answer 1

Answer:

x² + 2x + 1 is a polynomial in x variable.

Hope it helps!

Answer 2

A polynomial is defined as an expression which is composed of variables, constants and exponents, that are combined using the mathematical operations such as addition, subtraction, multiplication and division (No division operation by a variable).

Polynomial given in question is $x^{2}+2x+1$

In this polynomial has one variable $x$ in the equation.