# Homework Help: I need help with polynomials

1. Feb 5, 2006

### gabby989062

the directions are: determine whether each expression is a polynomial.

i got the easyones like: 12x3-2x2+0.5 is a polynomial

but i cant figure these out:

(x3/11)+(x2/8)
I dont know if the variables can be fractions but i think this could be this:
1/11x3+1/8 x2 so i think it is a polynomial.:surprised

4x-22x+35x

im not sure if the variable can be the exponent

please explain how it is or is not a polynomial. thank you

2. Feb 5, 2006

### Moo Of Doom

Polynomials are functions that can be expressed as $a+bx+cx^2+...+px^n$ for real numbers a,b,c,...,p.
Thus the one with fractions is a polynomial because those fractions are real numbers. The one with x in the exponent, though, can't be so written, so it's not a polynomial.

3. Feb 5, 2006

### gabby989062

THANKS DUDIE! I TOTALLY GET IT KNOW! :!!)