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