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©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[211-00]
(1)
2
(
x
＋
1
)
−
1
=
0
(2)
2
(
x
−
1
)
=
36
(3)
2
(
x
−
3
)
=
9
(4)
2
(
x
＋
5
)
−
4
=
0
(5)
2
(
x
−
4
)
=
1
(6)
2
(
x
＋
2
)
=
100
(7)
2
(
x
＋
6
)
=
100
(8)
2
(
x
＋
3
)
−
9
=
0
(9)
2
(
x
＋
4
)
=
64
(10)
2
(
x
−
4
)
=
4
(11)
2
(
x
＋
1
)
=
36
(12)
2
(
x
−
6
)
−
64
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
1
)
−
1
=
0
x
＋
1
=
±
1
x
=
−
1
±
1
x
=
0
，
−2
(2)
2
(
x
−
1
)
=
36
x
−
1
=
±
6
x
=
1
±
6
x
=
7
，
−5
(3)
2
(
x
−
3
)
=
9
x
−
3
=
±
3
x
=
3
±
3
x
=
6
，
0
(4)
2
(
x
＋
5
)
−
4
=
0
x
＋
5
=
±
2
x
=
−
5
±
2
x
=
−3
，
−7
(5)
2
(
x
−
4
)
=
1
x
−
4
=
±
1
x
=
4
±
1
x
=
5
，
3
(6)
2
(
x
＋
2
)
=
100
x
＋
2
=
±
10
x
=
−
2
±
10
x
=
8
，
−12
(7)
2
(
x
＋
6
)
=
100
x
＋
6
=
±
10
x
=
−
6
±
10
x
=
4
，
−16
(8)
2
(
x
＋
3
)
−
9
=
0
x
＋
3
=
±
3
x
=
−
3
±
3
x
=
0
，
−6
(9)
2
(
x
＋
4
)
=
64
x
＋
4
=
±
8
x
=
−
4
±
8
x
=
4
，
−12
(10)
2
(
x
−
4
)
=
4
x
−
4
=
±
2
x
=
4
±
2
x
=
6
，
2
(11)
2
(
x
＋
1
)
=
36
x
＋
1
=
±
6
x
=
−
1
±
6
x
=
5
，
−7
(12)
2
(
x
−
6
)
−
64
=
0
x
−
6
=
±
8
x
=
6
±
8
x
=
14
，
−2