1.	The roots of  x2 + 4x + 7 are________.
		A.	real and imaginary	B.	imaginary
		C.	real and irrational	D.	real and rational
		Hint
	2.	Solve  x2 - 6x + 25 = 0.
		A.	6 ± 8i	B.	-3 ± 4i
		C.		D.	3 ± 4i
		Hint
	3.	Solve 2x2 - 4x + 3 = 0.
		A.		B.
		C.		D.
		Hint
	4.	Suppose a ball is thrown straight up at a speed of 50 feet per second. The time in seconds that it takes for the ball to hit the ground can be found by solving the equation 5 + 50t - 16t2 = 0. Approximately how long does it take for the ball to hit the ground?
		A.	4.8 s	B.	0.1 s
		C.	3.2 s	D.	-0.1 s
		Hint
	5.	Solve x2 + 14x + 49 = 0 by using the quadratic formula.
		A.	6, 8	B.	–7
		C.	–6, –8	D.	7
		Hint