1 a. 5 b. 3 c. 3
2 a. No b. Yes c.No
3 a. 48 b. 12 c. 25.5
4 a. 88 b. 16 c. -32

5. a. x = 2 or x =-3 or x =7
b. x = -4/3 or x =1
c. x = 1 or x = 2 or x = 3 or x = 4
d. x = 3/2 or x = 1/3 or x = -1/4

6
a
(x − 1)(x − 2)(x + 2)
b
(x − 1)(x − 2)(x + 4)
c
(x − 2)(x + 3)(x − 4)
d
(x − 1)(x − 1)(x − 4) = (x − 1)2(x − 4)
e
(x − 1)(x + 1)(x + 3)
f
(x + 1)(x + 2)(x + 3)
g
(x − 2)(x − 3)(x − 3) = (x − 2)(x − 3)2