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There is no restriction on the coefficient of the polynomial, it can either be a fraction,a negative number of a positive number or even irrational number. It does not have any effect.
What matters is the exponent. The exponent must be a non-negative integer. Since in this case the exponent is positive, the expression will be a polynomial.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.