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