Question

State whether the given algebraic expression are polynomial? Justify.

`2 - 5 sqrt x`

Answer 1

`2-5sqrtx`

An expression is a polynomial in x if:

The powers of x are whole numbers (0, 1, 2, 3, …)

The coefficients are real numbers

`sqrtx = x^(1/2)`

The power of x is 1/2, which is not a whole number.