Which of the expressions below is NOT a polynomial?
A. (1/3)x + 4
B. 3x2
C. 1/x+ x2
D. 7x4 + 8x2 + 5

Question

Which of the expressions below is NOT a polynomial?
	A.	(1/3)x + 4
	B.	3x2
	C.	1/x+ x2
	D.	7x4 + 8x2 + 5

whpalmer4 · Answer

polynomials are built by multiplication, addition, subtraction...

anonymous · Answer

u need to see the exponents too
the polinomials must have integer positive exponents

whpalmer4 · Answer

@julian25 the polynomials listed there do show their exponents, just badly formatted.
$$\frac{1}{3}x+4$$$$3x^2$$$$\frac{1}{x}+x^2$$$$7x^4+8x^2+5$$

whpalmer4 · Answer

@Reganbaughman417 which one of those does not belong?

anonymous · Answer

do u think that the third is a polinomial?

anonymous · Answer

the third answer

whpalmer4 · Answer

that's correct, it is not a polynomial because there is a division by $x$ which is the same as raising $x$ to a negative exponent (-1), and negative exponents aren't allowed in polynomials.  if it isn't a polynomial for that reason, it's called an algebraic expression...

anonymous · Answer

thank you so much

anonymous · Answer

c is the answers because you cannot have a variable as a denominator so in c, x is the denominator