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