cube rooty +y square is not polynomial ?why
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because it has root in one of the term
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the definition of polynomial requires that the exponents must be positive integers.
integers are ...........-2, -1, 0, 1, 2, .... ..
positive integers are 0,1,2,3.......
in the expression
cuberoot y + y square
or y^(1/3) + y^2
the exponent of first y is 1/3 which is not positive integer. Hence, the expression is not polynimoal
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