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代数 示例
热门问题
代数
化简 (a-6)(a+6)
(
a
−
6
)
(
a
+
6
)
(
a
-
6
)
(
a
+
6
)
解题步骤 1
使用 FOIL 方法展开
(
a
−
6
)
(
a
+
6
)
(
a
-
6
)
(
a
+
6
)
。
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解题步骤 1.1
运用分配律。
a
(
a
+
6
)
−
6
(
a
+
6
)
a
(
a
+
6
)
-
6
(
a
+
6
)
解题步骤 1.2
运用分配律。
a
⋅
a
+
a
⋅
6
−
6
(
a
+
6
)
a
⋅
a
+
a
⋅
6
-
6
(
a
+
6
)
解题步骤 1.3
运用分配律。
a
⋅
a
+
a
⋅
6
−
6
a
−
6
⋅
6
a
⋅
a
+
a
⋅
6
-
6
a
-
6
⋅
6
a
⋅
a
+
a
⋅
6
−
6
a
−
6
⋅
6
a
⋅
a
+
a
⋅
6
-
6
a
-
6
⋅
6
解题步骤 2
化简项。
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解题步骤 2.1
合并
a
⋅
a
+
a
⋅
6
−
6
a
−
6
⋅
6
a
⋅
a
+
a
⋅
6
-
6
a
-
6
⋅
6
中相反的项。
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解题步骤 2.1.1
按照
a
⋅
6
a
⋅
6
和
−
6
a
-
6
a
重新排列因数。
a
⋅
a
+
6
a
−
6
a
−
6
⋅
6
a
⋅
a
+
6
a
-
6
a
-
6
⋅
6
解题步骤 2.1.2
从
6
a
6
a
中减去
6
a
6
a
。
a
⋅
a
+
0
−
6
⋅
6
a
⋅
a
+
0
-
6
⋅
6
解题步骤 2.1.3
将
a
⋅
a
a
⋅
a
和
0
0
相加。
a
⋅
a
−
6
⋅
6
a
⋅
a
-
6
⋅
6
a
⋅
a
−
6
⋅
6
a
⋅
a
-
6
⋅
6
解题步骤 2.2
化简每一项。
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解题步骤 2.2.1
将
a
a
乘以
a
a
。
a
2
−
6
⋅
6
a
2
-
6
⋅
6
解题步骤 2.2.2
将
−
6
-
6
乘以
6
6
。
a
2
−
36
a
2
-
36
a
2
−
36
a
2
-
36
a
2
−
36
a
2
-
36
(
a
−
6
)
(
a
+
6
)
(
a
-
6
)
(
a
+
6
)
(
(
)
)
|
|
[
[
]
]
√
√
≥
≥
7
7
8
8
9
9
≤
≤
4
4
5
5
6
6
/
/
^
^
×
×
>
>
∩
∩
∪
∪
1
1
2
2
3
3
-
-
+
+
÷
÷
<
<
π
π
∞
∞
,
,
0
0
.
.
%
%
=
=
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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