Question

State whether the given algebraic expression are polynomial? Justify.

`x^2 + 7x + 9`

Answer 1

In an algebraic expression, if the powers of the variables are whole numbers then the algebraic expression is a polynomial. 

`x^2 + 7x + 9`

Here, the powers of the variable x are 2, 1 and 0, which are whole numbers.

∴ `x^2 + 7x + 9` is a polynomial.