［文字サイズの変更］
▼
▲
©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
)
=
16
(2)
2
(
x
＋
1
)
=
49
(3)
2
(
x
＋
4
)
=
1
(4)
2
(
x
−
1
)
−
36
=
0
(5)
2
(
x
＋
3
)
−
9
=
0
(6)
2
(
x
＋
2
)
−
36
=
0
(7)
2
(
x
−
2
)
−
100
=
0
(8)
2
(
x
＋
2
)
=
25
(9)
2
(
x
＋
3
)
=
9
(10)
2
(
x
−
2
)
=
9
(11)
2
(
x
＋
3
)
−
4
=
0
(12)
2
(
x
＋
7
)
−
25
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
3
)
=
16
x
＋
3
=
±
4
x
=
−
3
±
4
x
=
1
，
−7
(2)
2
(
x
＋
1
)
=
49
x
＋
1
=
±
7
x
=
−
1
±
7
x
=
6
，
−8
(3)
2
(
x
＋
4
)
=
1
x
＋
4
=
±
1
x
=
−
4
±
1
x
=
−3
，
−5
(4)
2
(
x
−
1
)
−
36
=
0
x
−
1
=
±
6
x
=
1
±
6
x
=
7
，
−5
(5)
2
(
x
＋
3
)
−
9
=
0
x
＋
3
=
±
3
x
=
−
3
±
3
x
=
0
，
−6
(6)
2
(
x
＋
2
)
−
36
=
0
x
＋
2
=
±
6
x
=
−
2
±
6
x
=
4
，
−8
(7)
2
(
x
−
2
)
−
100
=
0
x
−
2
=
±
10
x
=
2
±
10
x
=
12
，
−8
(8)
2
(
x
＋
2
)
=
25
x
＋
2
=
±
5
x
=
−
2
±
5
x
=
3
，
−7
(9)
2
(
x
＋
3
)
=
9
x
＋
3
=
±
3
x
=
−
3
±
3
x
=
0
，
−6
(10)
2
(
x
−
2
)
=
9
x
−
2
=
±
3
x
=
2
±
3
x
=
5
，
−1
(11)
2
(
x
＋
3
)
−
4
=
0
x
＋
3
=
±
2
x
=
−
3
±
2
x
=
−1
，
−5
(12)
2
(
x
＋
7
)
−
25
=
0
x
＋
7
=
±
5
x
=
−
7
±
5
x
=
−2
，
−12