Which of the following expressions are polynomials? In case of a polynomial, write its degree.
(i) x5−2x3+x+√3
(ii) y3+√3y
(iii) t2−25t+√5
(i) x5−2x3+x+√3 is an expression having only non-negative integral powers of x. So, it is a polynomial. Also, the highest power of x is 5, so, it is a polynomial of degree 5.
(ii) y3+√3y is an expression having only non-negative integral powers of y. So, it is a polynomial. Also, the highest power of y is 3, so, it is a polynomial of degree 3.
(iii) t2−25t+√5 is an expression having only non-negative integral powers of t. So, it is a polynomial. Also, the highest power of t is 2, so, it is a polynomial of degree 2.