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 r4 – 81.
		A.	(r2 + 9)(r2 + 9)	B.	(r + 3)2(r + 3)2
		C.	(r2 + 9)(r + 3)(r - 3)	D.	prime
		Hint
	3.	Factor
		A.		B.
		C.		D.	prime
		Hint
	4.	Factor 3x3 + 3x2 – 12x – 12.
		A.	(x – 2)(x + 2)(x + 1)	B.	3(x – 2)(x – 2)(x + 1)
		C.	3(x – 2)(x + 2)(x + 1)	D.	(x – 2)(x – 2)(x + 1)
		Hint
	5.	Solve 27x3 = 147x.
		A.		B.
		C.		D.
		Hint