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©2025 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
)
=
16
(2)
2
(
x
＋
2
)
=
49
(3)
2
(
x
＋
3
)
=
64
(4)
2
(
x
＋
5
)
−
4
=
0
(5)
2
(
x
−
5
)
=
81
(6)
2
(
x
＋
7
)
=
2
(7)
2
(
x
−
5
)
−
16
=
0
(8)
2
(
x
＋
1
)
=
3
(9)
2
(
x
＋
9
)
=
16
(10)
2
(
x
＋
5
)
−
1
=
0
(11)
2
(
x
＋
10
)
=
25
(12)
2
(
x
＋
2
)
=
100
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
1
)
=
16
x
−
1
=
±
4
x
=
1
±
4
x
=
5
，
−3
(2)
2
(
x
＋
2
)
=
49
x
＋
2
=
±
7
x
=
−
2
±
7
x
=
5
，
−9
(3)
2
(
x
＋
3
)
=
64
x
＋
3
=
±
8
x
=
−
3
±
8
x
=
5
，
−11
(4)
2
(
x
＋
5
)
−
4
=
0
x
＋
5
=
±
2
x
=
−
5
±
2
x
=
−3
，
−7
(5)
2
(
x
−
5
)
=
81
x
−
5
=
±
9
x
=
5
±
9
x
=
14
，
−4
(6)
2
(
x
＋
7
)
=
2
x
＋
7
2
=
±
x
2
=
−
7
±
(7)
2
(
x
−
5
)
−
16
=
0
x
−
5
=
±
4
x
=
5
±
4
x
=
9
，
1
(8)
2
(
x
＋
1
)
=
3
x
＋
1
3
=
±
x
3
=
−
1
±
(9)
2
(
x
＋
9
)
=
16
x
＋
9
=
±
4
x
=
−
9
±
4
x
=
−5
，
−13
(10)
2
(
x
＋
5
)
−
1
=
0
x
＋
5
=
±
1
x
=
−
5
±
1
x
=
−4
，
−6
(11)
2
(
x
＋
10
)
=
25
x
＋
10
=
±
5
x
=
−
10
±
5
x
=
−5
，
−15
(12)
2
(
x
＋
2
)
=
100
x
＋
2
=
±
10
x
=
−
2
±
10
x
=
8
，
−12