Which expressions are polynomials?

Select each correct answer.

30y^2+x

30y^2+x^1/2

(30y^2)/x

30y^2

Guest Aug 30, 2018

#1**+1 **

30y^{2} + x This is a polynomial.

30y^{2} + x^{1/2} If this your expression, it is not a polynomial because the exponent of x is a fraction.

(30y^{2})/x This is not a polynomial because x is in the denominator.

30y^{2} This is a polynomial.

Also, this might help you: https://www.mathsisfun.com/definitions/polynomial.html

hectictar Aug 30, 2018

#2**+1 **

A polynomial cannot fractional exponents associated with any variable.....so the second one is out

Also....

(30y^2 ) / x = 30y^2 x^-1....and a polynomial cannot have negative exponents associated wiith any variable

So....

The first and last answers are correct...[ only non-negative non-fractional exponents are allowed ]

CPhill Aug 30, 2018