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©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の式を因数分解しなさい
[1B0-00]
(1)
2
3
u
+
9
u
(2)
2
x
−
8
x
(3)
2
4
p
+
2
p
(4)
2
3
a
+
6
a
(5)
2
5
x
+
x
(6)
2
10
x
+
2
x
(7)
2
4
p
−
10
p
(8)
2
u
+
10
u
(9)
2
x
+
8
x
(10)
2
9
x
+
5
x
(11)
2
6
x
+
2
x
(12)
2
7
p
−
7
p
(13)
2
6
x
+
5
x
(14)
2
8
a
−
3
a
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
3
u
+
9
u
=
3
u
(
u
+
3
)
(2)
2
x
−
8
x
=
x
(
x
−
8
)
(3)
2
4
p
+
2
p
=
2
p
(
2
p
+
1
)
(4)
2
3
a
+
6
a
=
3
a
(
a
+
2
)
(5)
2
5
x
+
x
=
x
(
5
x
+
1
)
(6)
2
10
x
+
2
x
=
2
x
(
5
x
+
1
)
(7)
2
4
p
−
10
p
=
2
p
(
2
p
−
5
)
(8)
2
u
+
10
u
=
u
(
u
+
10
)
(9)
2
x
+
8
x
=
x
(
x
+
8
)
(10)
2
9
x
+
5
x
=
x
(
9
x
+
5
)
(11)
2
6
x
+
2
x
=
2
x
(
3
x
+
1
)
(12)
2
7
p
−
7
p
=
7
p
(
p
−
1
)
(13)
2
6
x
+
5
x
=
x
(
6
x
+
5
)
(14)
2
8
a
−
3
a
=
a
(
8
a
−
3
)