Answer to study guide
1) x </= -4
2) –4 < x < 1
3) [-2,1]
4) (-infinity,-7) or (1,infinity) x < -7 or x >1
5) [- 3,5] or - 3 < x < 5
6) 10x9
7) 8x15
8) x3
9) (x-4)(x-4)
10) (c-3)(c+3)
11) (3x - 2)(9x2 + 6x + 4)
12) x = 2, x = -1
13) (x2 + 4)(x -1) = 0 so x = 1
14) x = -1