How many factors did x^3-2x^2-x+2 have? Name them?
Answers
Answered by
1
Answer:
Explanation:
x
3
−
2
x
2
−
x
+
2
=
x
3
−
x
−
2
x
2
+
2
Grouping the
1
s
t
2
terms together and the
2
n
d
2
together:
=
x
(
x
2
−
1
)
−
2
(
x
2
−
1
)
=
(
x
2
−
1
)
(
x
−
2
)
Using the identity:
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
=
(
x
2
−
1
2
)
(
x
−
2
)
=
(
x
−
1
)
(
x
+
1
)
(
x
−
2
)
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