A student simplified a rational expression as
shown.
Which of the following mistakes did the student
make?
20 - 5. x2
x² + x - 6
The student did not factor the numerator
correctly.
The student could not divide out (2 - x) and (x
-2) as written.
5 (4 - r?)
(x - 2) (x + 3)
5 (2 - x) (2 + x)
(x - 2) (x+3)
5 (x + 2)
(r + 3)
The student did not factor the denominator
correctly.
The student needed to simplify further by
dividing out x.
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