Question

which of following expression are polynomials
1 8
2 root3x^2 -2x
3 1-root5x
4 1/x+1
5(x-2) (x-4)/x
6 1/x+1
7 1/2x
8 1/7a^3 - 2/root3a^2 +4a - 7

Answer 1

nothing is a polynomial because in all cases power of X is negative or fraction

Answer 2

1) it is polynomial because 8=8x^0 0 is a non negative integral power
2) it is polynomial because the poet of x is non negative integral value
3) of Root is on both 5,x, then it is not polynomial. of Roor is only on 5, then it is polynomial
4) it is not polynomial because 1/x=x^-1 the power on variable is negative integer
5) it is not polynomial because it can be written as (x-2)(x-4)(x^-1)
6) both 4 and 6 are same questions
7) it's not polynomial because after reciprocal x carries negative power
8) it is not polynomial because after taking reciprocal of 2/root 3a^2, we get negative integral power

hope it helps you
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