Find which of the following algebraic expression is a polynomial.
(i) 3x2−5x
(ii) x+1x
(iii) √y−8
(i) 3x2−5x=3x2−5x1
It is a polynomial.
(ii) x+1x=x1+x−1
It is not a polynomial
(iii) √y−8=y1/2−8
Since, the power of the first term
(√y) is 1/2, which is not a whole number.
Therefore it is not a polynomial.