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Math 10007
Spring 2011
Assignment 3: Sections 1.4-1.6
Name___________________________________
DUE: Monday, January 31
Directions: Choose the one alternative that best completes the statement or answers the question. Fill-in the Scantron
with your final answer. Show all work/steps on separate paper(s).
SECTION 1.4
Multiply and, if possible, simplify.
6x2 35
·
1)
5
x3
A)
42
x
1)
B)
x5
29
C)
42x2
x3
D)
x
29
Multiply and, if possible, simplify.
4p2 - 4
4p2
·
2)
p
7 - 7p2
A)
3)
16p4 - 16p2
7p - 7p3
2)
B) -
7
16p
C) -
16p
7
D)
16p
7
x2
x2 - 7z + 12
·
x2 - 9
x2 - 4x
A)
x
(x + 3)(x + 4)
3)
B)
x2
x+3
C)
x
x+3
D)
x
x-3
Find the product and simplify.
5x3 y3
· y9
4)
-45xy12
A)
5)
x2 y
-9
4)
B)
x3
-9
C)
x3
-9y
D)
x2
-9
7
x
·
x+7 6
A)
x
(x + 6)
5)
B)
7
6
C)
1
6
Perform the indicated operation and simplify if possible.
x2 - 16 x2 + 3x + 1
÷
6)
2x + 6
x2 + 4x
D)
7x
6(x + 7)
6)
A)
2(x - 4)(x + 3)
x(x2 + 3x + 1)
B)
(x - 4)(x2 + 3x + 1)
2x(x + 3)
C)
2(x + 4)(x + 3)
x(x2 + 3x + 1)
D)
(x + 4)(x2 + 3x + 1)
2x(x + 3)
1
Find the quotient and simplify.
4y3 8y3 z 5
÷
7)
9
z5
A)
8)
(y - 2)3
121
9
2z 10
C)
D)
32y6
9
8)
B)
11(y - 2)2
11y - 22
C)
1
y-2
D) y - 2
x+9
x+7
9)
B) -
(x + 9)(x - 9)
(x + 2)2
C)
x-9
x+7
D) -
x-9
x+7
5p - 5 8p - 8
÷
p
8p2
A)
10)
1
p
5
C) 5p
11)
9y6
2z 10
x+9
x 2 - 2x - 63
÷
-2 - x x 2 - 7x - 18
A) -
10)
B)
(y - 2)2 11y - 22
÷
11
121
A)
9)
9
2
7)
B)
40p2 + 80p + 40
8p3
D)
40p3 - 40p2
8p2 - 8p
z 2 + 13z + 40
z 2 + 5z
÷
z 2 + 15z + 56 z2 + 5z - 14
A)
z-2
z
11)
B)
z
C)
z 2 + 15z + 56
z-2
z 2 + 7z
D) z - 2
SECTION 1.5
Perform the indicated operation. Simplify, if possible.
4
2
+
12)
8x2 8x2
A) 3
13)
3
C)
4x2
4
3x2
D)
3
2x4
3x + 30
x + 18
2
2
x + 2x - 24 x + 2x - 24
A) 2x + 12
14)
B)
12)
13)
B)
2
x-4
C)
1
x-2
D)
2x + 48
x2 + 2x - 24
x2 - 11x
30
+
x-5
x-5
A) x - 6
14)
B) x - 5
C) x + 6
2
D) x + 5
Find the least common denominator (LCD).
5
3
15) ,
x x+7
A) x(x + 7)
16)
B) 15
C) x + 7
D) x
4
8
,
12x 15x 2
A) 60x3
17)
15)
16)
B) 60
C) 60x
D) 60x2
8
4
,
2
5x
- 10
x - 4x + 4
A) 5(x - 2)(x + 2)
17)
B) 5(x + 2)(x + 2)
C) 5(x + 2)(x - 2)
D) 5(x - 2)(x - 2)
Rewrite the rational expression as an equivalent rational expression with the given denominator.
x
=
18)
x + 4 3x + 12
A)
19)
3
3x + 12
B)
x
3x + 12
C)
3x
3x + 12
D)
4x
3x + 12
20
=
10 - y y - 10
A) -
1
y - 10
19)
B) -
20
y - 10
C) -
20(y - 10)
y - 10
D)
20
y - 10
Perform the indicated operations. Simplify if possible.
3x
4
6
+
20)
x + 1 x - 1 x2 - 1
A)
21)
3x
x-1
B)
20)
3x - 2
x+1
C)
3x - 2
x-1
D)
x+1
x-1
t-1 t+ 5
t-3
+
4 - t t + 4 16 - t2
A)
2t2 + 5t + 27
16 - t2
21)
B)
-2t2 - 5t - 27
t2 - 16
C)
2t2 + 5t - 27
16 - t2
D)
2t2 + 5t - 27
t2 - 16
Perform the indicated operation. Simplify if possible.
7
16
+
22)
x-4 4-x
A)
23)
23
x-4
B) -
22)
9
x-4
C) -
23
x-4
D)
9
x-4
6x - 8
+1
x+2
A)
6x - 6
x+2
18)
23)
B)
7x - 6
x+2
C)
3
5x - 6
x+2
D)
6x + 6
x+2
24)
6x
24
2
2
x - 5x + 6 x - 6x + 8
24)
A)
6(x - 6)
(x - 3)(x - 4)
B)
x-6
(x - 3)(x - 4)
C)
6
(x - 2)(x - 3)
D)
6x - 24
(x - 2)(x - 3)(x - 4)
SECTION 1.6
Solve the equation.
3
4
=
25)
x-8 x+2
A) 10
26)
29) 1 +
D) 26
26)
B) No solution
C) - 2
1
2
D) -
27)
B)
4
19
C)
1
19
4
19
D) -
B) -14
28)
C) -7
D) no solution
1 56
=
x x2
A) 8, -7
29)
B) -8, 7
C) 8, 7
D) -
1 1
,
8 7
y+1
y
y- 3
=
y + 6 y2 - 36 y - 6
A) 1
31) x +
30)
B)
4
5
C)
4
3
D)
3
4
40
= -13
x
A) -13, 40
32)
C) 38
m+ 2
2
m- 2
=
2
2
2
m + 8 m + 15 m + 10 m + 25
m + 8 m + 15
A) 7
30)
38
7
-2x
7x
2x- 1
=
+
2x + 2
4x + 4
x+ 1
A) 4
28)
B) -
x
2
- 5 =
x- 2
x- 2
A) 2
27)
25)
31)
B) -5, -8
C) 5, 8
D) 40
x+1
4
=
x-8
8-x
A) -3
32)
B) 5
C) 3
4
D) -5
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