Question

2. Which of the following cannot be a part of a rational expression?O-7x⁰3x²3x² - 4x + 5043x² - 4√x

Answer 1

To be part of a rational expression, we need to have a polynomial expression.

By definition, all the exponents of a polynomial expression are positive integer values (including 0).

We know that:

$\sqrt{x}=x^{\frac{1}{2}}$

So the last option is not a polynomial.

Answer: The last option