Study Set:
40 questions on Algebra
CPT Review 4/17/01
18
39. D
For what value(s) of x will each expression be undefined?
x
x
x
x
2
2
4
4
6
+
+
+ −
An expression is undefined when the denominator equals zero. To solve set the
denominator equal to zero and solve for x.
(
)(
)
2
or
3
0
2
-
or x
0
3
0
2
3
0
6
2
=
−
=
=
=
+
=
−
+
=
−
+
x
x
x
x
x
x
x
40. C
Which of the following is a factor of both equations?
5
3
2
5
4
2
2
−
+
−
+
x
x
x
x
Factor both equations and compare results
(
)( )
1
5
5
4
2
−
+
−
+
x
x
x
x
(
)(
)
1
5
2
5
3
2
2
−
+
−
+
x
x
x
x
The matching factor is (x-1)