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Algebra Examples
Popular Problems
Algebra
Factor x^2-x-2
x
2
−
x
−
2
x
2
-
x
-
2
Step 1
Consider the form
x
2
+
b
x
+
c
x
2
+
b
x
+
c
. Find a pair of
integers
whose
product
is
c
c
and whose
sum
is
b
b
. In this case, whose
product
is
−
2
-
2
and whose
sum
is
−
1
-
1
.
−
2
,
1
-
2
,
1
Step 2
Write the factored form using these
integers
.
(
x
−
2
)
(
x
+
1
)
(
x
-
2
)
(
x
+
1
)
x
2
−
x
−
2
x
2
-
x
-
2
(
(
)
)
|
|
[
[
]
]
√
√
≥
≥
7
7
8
8
9
9
≤
≤
4
4
5
5
6
6
/
/
^
^
×
×
>
>
∩
∩
∪
∪
1
1
2
2
3
3
-
-
+
+
÷
÷
<
<
π
π
∞
∞
,
,
0
0
.
.
%
%
=
=
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