Which expression is equivalent to
x
3
–
x
2
–
4
x
+
4
?(
x
–
1
)
(
x
+
1
)
(
x
–
4
)
(
x
–
2
)
(
x
+
2
)
(
x
–
1
)
(
x
2
–
2
)
(
x
–
2
)
(
x
2
+
1
)
(
x
–
4
)
ref_doc_title.
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