1.	Factor x2 – 16.
		A.	(x + 2)(x – 8)	B.	(x – 4)(x – 4)
		C.	(x + 4)(x + 4)	D.	(x + 4)(x – 4)
		Hint
	2.	Factor 4y2 – 9.
		A.	(2y – 3)(2y – 3)	B.	prime
		C.	(2y + 3)(2y + 3)	D.	(2y + 3)(2y – 3)
		Hint
	3.	Factor r4 – 81.
		A.	(r2 + 9)(r + 3)(r - 3)	B.	(r2 + 9)(r2 + 9)
		C.	prime	D.	(r + 3)2(r + 3)2
		Hint
	4.	Solve 4y2 – 25 = 0.
		A.	or	B.
		C.		D.
		Hint
	5.	Suppose that we have a 3 ft. × 3 ft. piece of paper, and we cut out a square piece so that the area of the remaining piece is 5 feet. What is the length of a side of the square?
		A.		B.
		C.	2 ft.	D.	4 ft.
		Hint