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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
＋
5
)
=
64
(2)
2
(
x
−
7
)
−
25
=
0
(3)
2
(
x
＋
2
)
−
3
=
0
(4)
2
(
x
＋
8
)
−
49
=
0
(5)
2
(
x
−
1
)
=
25
(6)
2
(
x
−
4
)
=
25
(7)
2
(
x
−
3
)
−
36
=
0
(8)
2
(
x
−
1
)
=
49
(9)
2
(
x
−
1
)
=
4
(10)
2
(
x
＋
6
)
−
16
=
0
(11)
2
(
x
−
4
)
=
16
(12)
2
(
x
＋
6
)
=
49
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
5
)
=
64
x
＋
5
=
±
8
x
=
−
5
±
8
x
=
3
，
−13
(2)
2
(
x
−
7
)
−
25
=
0
x
−
7
=
±
5
x
=
7
±
5
x
=
12
，
2
(3)
2
(
x
＋
2
)
−
3
=
0
x
＋
2
3
=
±
x
3
=
−
2
±
(4)
2
(
x
＋
8
)
−
49
=
0
x
＋
8
=
±
7
x
=
−
8
±
7
x
=
−1
，
−15
(5)
2
(
x
−
1
)
=
25
x
−
1
=
±
5
x
=
1
±
5
x
=
6
，
−4
(6)
2
(
x
−
4
)
=
25
x
−
4
=
±
5
x
=
4
±
5
x
=
9
，
−1
(7)
2
(
x
−
3
)
−
36
=
0
x
−
3
=
±
6
x
=
3
±
6
x
=
9
，
−3
(8)
2
(
x
−
1
)
=
49
x
−
1
=
±
7
x
=
1
±
7
x
=
8
，
−6
(9)
2
(
x
−
1
)
=
4
x
−
1
=
±
2
x
=
1
±
2
x
=
3
，
−1
(10)
2
(
x
＋
6
)
−
16
=
0
x
＋
6
=
±
4
x
=
−
6
±
4
x
=
−2
，
−10
(11)
2
(
x
−
4
)
=
16
x
−
4
=
±
4
x
=
4
±
4
x
=
8
，
0
(12)
2
(
x
＋
6
)
=
49
x
＋
6
=
±
7
x
=
−
6
±
7
x
=
1
，
−13