Operating with Rational Expressions
Algebra · Flashcards · Recall
ALGEBRA · FLASHCARDS
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QUESTION
What is the result of adding
a
b
+
c
b
\frac{a}{b}+\frac{c}{b}
b
a
+
b
c
when denominators match?
QUESTION
What is the rule for dividing by a rational expression
P
(
x
)
Q
(
x
)
\frac{P(x)}{Q(x)}
Q
(
x
)
P
(
x
)
?
QUESTION
What restriction must be stated for the rational expression
P
(
x
)
Q
(
x
)
\frac{P(x)}{Q(x)}
Q
(
x
)
P
(
x
)
?
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ANSWER
Q
(
x
)
≠
0
Q(x)\neq 0
Q
(
x
)
=
0
(exclude values making
Q
(
x
)
=
0
Q(x)=0
Q
(
x
)
=
0
). The denominator cannot equal zero to avoid division by zero.
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