1.	List the possible rational roots of 3x3 + 5x2 - 2x + 1 = 0.
		A.	1,	B.	,
		C.	,	D.	1,
		Hint
	2.	Find the roots of x3 + 2x + 3 = 0.
		A.		B.	-1, 2
		C.		D.	1, -2
		Hint
	3.	Find the number of positive real zeros for f(x) = 3x5 + 2x3 + x2 + 7x - 1 = 0.
		A.	4 or 2 positive real zeros	B.	exactly 1 positive real zero
		C.	no positive real zeros	D.	4 or 2 or 0 positive real zeros
		Hint
	4.	Find the rational zeros of the equation 2x4 - x3 - 21x2 + 9x + 27 = 0.
		A.	3, -3, -1,	B.	3, 1, -1,
		C.	3, -3, -1,	D.	3, 1, -1,
		Hint
	5.	In a polynomial equation, if there is one change in sign of the coefficients of the terms, ____.
		A.	none of the above is correct	B.	there is exactly one positive real zero
		C.	there is one imaginary root	D.	there could be one or three positive real zeros
		Hint