CPT Review 4/17/01 

 

15 

23.  B 

Factor completely: 

36

12

2

+

−

x

x

.  

One

 factor is: 

 

 

(

)(

)

6

6

36

12

2

−

−

+

−

x

x

x

x

 

 

 

Therefore the correct listed factor is 

6

−

x

. 

 
 
24.  D 

Factor completely:  

21

14

7

2

−

+

x

x

.  

One

 factor is: 

 

 

(

)

(

)( )

1

3

7

3

2

7

21

14

7

2

2

−

+

−

+

−

+

x

x

x

x

x

x

 

 

 

Therefore the correct listed factor is 

3

+

x

. 

 

 

 

25.  C 

Solve:  

0

10

3

2

=

−

−

x

x

  

One

 solution is: 

 

 

5

or  x

   

2

0

5

or   

   

0

2

0

)

5

)(

2

(

0

10

3

2

=

−

=

=

−

=

+

=

−

+

=

−

−

x

x

x

x

x

x

x

 

 

 

Therefore the correct listed solution is –2. 

 
26.    D 

Solve:

0

5

2

2

=

−

x

x

.  The solutions are: 

 

 

(

)

2

5

       x

          

5

2x

     

          

0

5

2

or  

  

0

0

5

2

0

5

2

=

=

=

−

=

=

−

=

−

x

x

x

x

x

x

 

 

 

Therefore your answers are 

2

5

 

and

  

0

. 

 

27.  D 

Factor and reduce: 

18

9

12

3

2

+

−

x

x

 

 

 

 

(

)

(

)

(

)(

)

(

)

(

)

3

2

2

9

2

2

3

2

9

4

3

18

9

12

3

2

2

−

=

+

−

+

=

+

−

=

+

−

x

x

x

x

x

x

x

x