(i) x2 + 2x-2
The given expression is not a polynomial.
Because a polynomial does not contain any negative powers or fractions.
(ii) √(ax) + x2 – x3
The given expression is a polynomial.
Because the polynomial has positive powers.
(iii) 3y3 – √5y + 9
The given expression is a polynomial.
Because the polynomial has positive powers.
(iv) ax1/2 + ax + 9x2 + 4
The given expression is not a polynomial.
Because a polynomial does not contain any negative powers or fractions.
(v) 3x-3 + 2x-1 + 4x + 5
The given expression is not a polynomial.
Because a polynomial does not contain any negative powers or fractions.
