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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
−
3
)
=
1
(2)
2
(
x
−
6
)
−
25
=
0
(3)
2
(
x
＋
10
)
=
49
(4)
2
(
x
−
2
)
−
100
=
0
(5)
2
(
x
＋
4
)
−
64
=
0
(6)
2
(
x
＋
6
)
=
81
(7)
2
(
x
＋
6
)
=
36
(8)
2
(
x
＋
2
)
=
2
(9)
2
(
x
＋
7
)
−
49
=
0
(10)
2
(
x
＋
5
)
−
1
=
0
(11)
2
(
x
＋
6
)
=
100
(12)
2
(
x
−
7
)
=
49
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
3
)
=
1
x
−
3
=
±
1
x
=
3
±
1
x
=
4
，
2
(2)
2
(
x
−
6
)
−
25
=
0
x
−
6
=
±
5
x
=
6
±
5
x
=
11
，
1
(3)
2
(
x
＋
10
)
=
49
x
＋
10
=
±
7
x
=
−
10
±
7
x
=
−3
，
−17
(4)
2
(
x
−
2
)
−
100
=
0
x
−
2
=
±
10
x
=
2
±
10
x
=
12
，
−8
(5)
2
(
x
＋
4
)
−
64
=
0
x
＋
4
=
±
8
x
=
−
4
±
8
x
=
4
，
−12
(6)
2
(
x
＋
6
)
=
81
x
＋
6
=
±
9
x
=
−
6
±
9
x
=
3
，
−15
(7)
2
(
x
＋
6
)
=
36
x
＋
6
=
±
6
x
=
−
6
±
6
x
=
0
，
−12
(8)
2
(
x
＋
2
)
=
2
x
＋
2
2
=
±
x
2
=
−
2
±
(9)
2
(
x
＋
7
)
−
49
=
0
x
＋
7
=
±
7
x
=
−
7
±
7
x
=
0
，
−14
(10)
2
(
x
＋
5
)
−
1
=
0
x
＋
5
=
±
1
x
=
−
5
±
1
x
=
−4
，
−6
(11)
2
(
x
＋
6
)
=
100
x
＋
6
=
±
10
x
=
−
6
±
10
x
=
4
，
−16
(12)
2
(
x
−
7
)
=
49
x
−
7
=
±
7
x
=
7
±
7
x
=
14
，
0