31.
-2x2 – 10xy – 3y2
32.
5x12 – 7x8 – 15x4 + 21
33.
3x2(x2 – 9x + 2)
34.
2y 3 3 2
35.
1
p8
36.
4
37.
r ( r +15)
r 2 ! 49
38.
Solutions:!! 2,!! 2
x-intercepts:
(
) (
2,!0 ,!! ! 2,!0
39.
m!8
m+8
40.
Vertex is at (-3, 6)
Line of symmetry is x = -3
Minimum value of f(x) is 6
f(-3) = 6 is a minimum
Graph C
41.
5
42.
D
43.
5
44.
D
45.
(2 – c)(11 – c)
46.
8v ! 2
v!5
47.
0.6
)
48.
1
m4
49.
10
x +8
50.
7(3v + 7f)2
51.
18
52.
Discriminant = -100
C
53.
19 4
54.
x4
55.
5 + i 15 5 ! i 15
,!
2
2
56.
9, -9
57.
(r + 6)2
58.
Perimeter = 4c + 18
Area = c2 + 9c
59.
x-coordinate of the vertex is ½
y-coordinate of the vertex is 13/2
Line of symmetry is x = ½
Maximum value of f(x) is 13/2
f(1/2) = 13/2 is a maximum
Graph D
60.
2
61.
|a+3|
62.
28x3 + 35x2 + 11x + 1
63.
49z
2
1
6
11
64.
4, -8
65.
144m8
66.
a ! 2 ab + b
a!b