1.	Solve a2 - a - 20 = 0 by completing the square.
		A.	-4, 5	B.
		C.		D.	-5, 4
		Hint
	2.	Solve 2z2 + z - 4 = 0 by completing the square.
		A.		B.
		C.	-2, 1	D.
		Hint
	3.	Solve x2 – 8x + 16 = 13 by taking the square root of each side.
		A.	-2	B.	4
		C.	2	D.	-4
		Hint
	4.	Solve 0.25x2 – 7x – 15 = 0.
		A.	{4, 30}	B.	{–5, 3}
		C.	{3, 15}	D.	{–2, 30}
		Hint
	5.	When using a quadratic equation of the form ax2 + bx + c = 0 to find distances, what should always be ignored?
		A.	any solution if a is negative	B.	any solution if is negative
		C.	any positive solution	D.	any negative solution
		Hint