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# Rational Expressions - $\frac { { b }^{ 2 }-ab }{ a-b }$

ACTMAT-21G5Y4

Which of the following is equivalent to the rational expression:

$$\frac { { b }^{ 2 }-ab }{ a-b }$$

...where $a\neq b$?

A

$b$

B

$-b$

C

${ b }^{ 2 }$

D

${ b }^{ 2 }-1$

E

$0$