Question

Identify the expression is a polynomial or not.
$2.5a+5b^2-63c^{-2}+4$

• A. It is a polynomial expression.
• B. It is not a polynomial expression.

Answer 1

The correct option is B It is not a polynomial expression.

The exponent of polynomial expression is always a whole number.
In the expression, $2.5a+5b^2-63c^{-2}+4$
the unknown variables has the following exponents:
$a\to 1$
$b\to 2$
$c\to -2$
As the exponent of $c$ is $-2$ which is not a whole number, the expression is not a polynomial.