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©2026 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
u
+
2
u
(2)
2
7
p
−
7
p
(3)
2
a
+
5
a
(4)
2
3
u
+
7
u
(5)
2
8
p
+
5
p
(6)
2
10
p
−
5
p
(7)
2
p
−
7
p
(8)
2
3
a
−
3
a
(9)
2
4
p
+
10
p
(10)
2
5
p
−
7
p
(11)
2
7
p
+
7
p
(12)
2
3
x
−
7
x
(13)
2
2
p
+
p
(14)
2
10
u
+
8
u
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
u
+
2
u
=
u
(
u
+
2
)
(2)
2
7
p
−
7
p
=
7
p
(
p
−
1
)
(3)
2
a
+
5
a
=
a
(
a
+
5
)
(4)
2
3
u
+
7
u
=
u
(
3
u
+
7
)
(5)
2
8
p
+
5
p
=
p
(
8
p
+
5
)
(6)
2
10
p
−
5
p
=
5
p
(
2
p
−
1
)
(7)
2
p
−
7
p
=
p
(
p
−
7
)
(8)
2
3
a
−
3
a
=
3
a
(
a
−
1
)
(9)
2
4
p
+
10
p
=
2
p
(
2
p
+
5
)
(10)
2
5
p
−
7
p
=
p
(
5
p
−
7
)
(11)
2
7
p
+
7
p
=
7
p
(
p
+
1
)
(12)
2
3
x
−
7
x
=
x
(
3
x
−
7
)
(13)
2
2
p
+
p
=
p
(
2
p
+
1
)
(14)
2
10
u
+
8
u
=
2
u
(
5
u
+
4
)