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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
−
2
)
=
1
(2)
2
(
x
＋
6
)
−
4
=
0
(3)
2
(
x
−
5
)
−
16
=
0
(4)
2
(
x
＋
6
)
−
4
=
0
(5)
2
(
x
＋
1
)
−
8
=
0
(6)
2
(
x
＋
7
)
=
1
(7)
2
(
x
＋
7
)
=
1
(8)
2
(
x
＋
9
)
=
16
(9)
2
(
x
＋
3
)
=
49
(10)
2
(
x
−
2
)
=
81
(11)
2
(
x
＋
9
)
=
8
(12)
2
(
x
＋
5
)
−
49
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
2
)
=
1
x
−
2
=
±
1
x
=
2
±
1
x
=
3
，
1
(2)
2
(
x
＋
6
)
−
4
=
0
x
＋
6
=
±
2
x
=
−
6
±
2
x
=
−4
，
−8
(3)
2
(
x
−
5
)
−
16
=
0
x
−
5
=
±
4
x
=
5
±
4
x
=
9
，
1
(4)
2
(
x
＋
6
)
−
4
=
0
x
＋
6
=
±
2
x
=
−
6
±
2
x
=
−4
，
−8
(5)
2
(
x
＋
1
)
−
8
=
0
x
＋
1
2
=
±
2
x
2
=
−
1
±
2
(6)
2
(
x
＋
7
)
=
1
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(7)
2
(
x
＋
7
)
=
1
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(8)
2
(
x
＋
9
)
=
16
x
＋
9
=
±
4
x
=
−
9
±
4
x
=
−5
，
−13
(9)
2
(
x
＋
3
)
=
49
x
＋
3
=
±
7
x
=
−
3
±
7
x
=
4
，
−10
(10)
2
(
x
−
2
)
=
81
x
−
2
=
±
9
x
=
2
±
9
x
=
11
，
−7
(11)
2
(
x
＋
9
)
=
8
x
＋
9
2
=
±
2
x
2
=
−
9
±
2
(12)
2
(
x
＋
5
)
−
49
=
0
x
＋
5
=
±
7
x
=
−
5
±
7
x
=
2
，
−12