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Sample Test Solutions
Polynomials
1. Subtract the polynomials.
462 2 xx from 1064 2 xx
)462(1064 22 xxxx
)462(1064 22 xxxx
14126 2 xx
2. Multiply.
)63)(14( 2 xxx
)63(4 2 xxx )63(1 2 xx
6324412 223 xxxxx
625712 23 xxx
3. Factor completely.
byaybxax 22
)2()2( baybax
))(2( yxba
4. Factor completely.
643 y
33 )4()( y
)164)(4( 2 yyy
5. Factor completely.
968 2 xx
96128 2 xxx
)32(3)32(4 xxx
)34)(32( xx
6. Factor completely.
xx 93
)9( 2 xx
)3)(3( xxx
Rational Expressions
7. Simplify.
45
4722
2
xx
xx
)4)(1(
)4)(12(
xx
xx
1
12
x
x
8. Multiply.
81
6
187
3642
2
2
a
aa
aa
a
)9)(9(
)2)(3(
)2)(9(
)9(4
aa
aa
aa
a
)9(
)3(
)9(
4
a
a
a
2)9(
)3(4
a
a
9. Divide.
2
3
4
6 2
2
22
a
ab
a
ba
2
22
3
2
)2)(2(
6
ab
a
aa
ba
2
2
a
a
10. Subtract.
34
3
52
5
xx
52
52
34
3
34
34
52
5
x
x
xx
x
x
)34)(52(
)52(3)34(5
xx
xx
)34)(52(
1561520
xx
xx
)34)(52(
3014
xx
x
11. Simplify.
2
65
23
yx
yx
x
x
yy
y
x
x
x
yy
y
x
22
2 65
23
2
2 65
23
xy
xy
xy
xy
2
2 6523
xy
xy
xy
xy
xy
xy
xy
xy
65
232
2
)65(
)23(2 xy
yxy
12. Solve.
nn 3
11
6
13
, 0n
nn
nn
3
11)6(
6
136
nnn
nn
3
11)6(
6
16
3)6(
2218 n
4n
4
13. Solve.
4
1
164
72
xx
x
x , 4x and 4x
4
1
16)4)(4(
4
7)4)(4(
2 xx
xxx
xxx
)4(1)4(7 xxx
4287 xxx
42287 xx
325 x
5
32x
5
32x
5
32
Radicals
14. Simplify. All variables represent positive real
numbers.
4375 yx
yyyyxxx 553
xxy 35 2
15. Find the sum.
xxx 8010455204
xxx 5)4(105)3(55)2(4
xxx 54051558
x517
16. Multiply.
)45)(62( 33
)4)(6)(5)(2( 33
)24(10 3
3 322210
3 3)2(10
3 320
17. Multiply.
)325(223
)3)(2()25)(2()3(23)25)(23(
621029415
621)2(15
6230
224
18. Rationalize the denominator.
12
7
=32
7
3
3
32
7
92
21
)3(2
21
=6
21
19. Solve and check.
4113 x
313 x
22)3(13 x
913 x
103 x
3
10x
Check
4113
103
41110
419
413
44
3
10
20. Write the following using positive rational
exponents.
3 2y
3
1
)2( y
3
1
3
1
2 y
Quadratic Equations
21. Solve.
zz 1092
09102 zz
0)9(1 zz
01z or 09 z
1z or 9z
9,1
22. Solve.
0362 xx
362 xx
93962 xx
12)3)(3( xx
12)3( 2 x
123 x
123x
323x
323
23. Solve.
0283 2 xx
)3(2
)2)(3(4)8()8( 2 x
6
24648 x
6
408 x
6
1028 x
6
)104(2 x
3
104 x
3
104
Complex Numbers
24. Add.
)78()46( ii
i)74()86(
i32
25. Multiply.
)65(23 ii
)6)(2()5)(2()6)(3()5)(3( iiii
212101815 iii
)1(122815 i
122815 i
i283
Functions
26. Find the domain.
4
3)(
x
xxf
Set the denominator equal to zero and solve for the
variable.
04 x
4x
Exclude this value from the domain.
The domain of the function is all real numbers
except ‐4.
27. If 752)( 2 xxxf , find )2(f .
7)2(5)2(2)2( 2 f
7)10()4(2
7108
11
Systems of Equations
28. Solve the system of equations.
2732
94
yx
yx
Substitution Method
Solving the first equation for y
94 xy
Substituting in place of y in the second equation
27)94(32 xx
2727122 xx
272714 x
014 x
0x
9)0(4 y
9y
9,0
Elimination by Addition Method
2732
)9(3)4(3
yx
yx
2732
27312
yx
yx
Adding the equations
0014 yx
014 x
0x
Substituting x=0 in the first equation and
solving for y
9)0(4 y
9
9
y
y
)9,0(
Absolute Value Equations
29. Solve. 1113 x
1113 x or 1113 x
123 x or 103 x
4x or 3
10x
4,3
10
30. Solve.
43 x
No solution
Distance cannot be negative.