Question 257957
1.1+x^2+2x
ANSWER: YES
x^2 + 2x + 1
--
2. x- 1/x
ANSWER: NOT a polynomial ; variable in denominator.
--
3. x^-2+ 3x+5
ANSWER: NOT a polynomial; variable has negative exponent
--
4. 3x^4+x^7+3x^5-2x+1
ANSWER: YES
x^7 + 3x^5 + 3x^4 - 2x + 1