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.