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©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[210-00]
(1)
2
−5
x
=
−405
(2)
2
−6
x
=
−4
(3)
2
−3
x
=
−108
(4)
2
5
x
=
125
(5)
2
9
x
=
3
(6)
2
5
x
=
125
(7)
2
−2
x
=
−2
(8)
2
−3
x
=
−192
(9)
2
−2
x
=
−98
(10)
2
3
x
=
75
(11)
2
2
x
=
2
(12)
2
−3
x
=
−108
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−5
x
=
−405
2
x
=
81
x
=
±
9
(2)
2
−6
x
=
−4
2
x
2
=
3
x
6
=
±
3
(3)
2
−3
x
=
−108
2
x
=
36
x
=
±
6
(4)
2
5
x
=
125
2
x
=
25
x
=
±
5
(5)
2
9
x
=
3
2
x
1
=
3
x
3
=
±
3
(6)
2
5
x
=
125
2
x
=
25
x
=
±
5
(7)
2
−2
x
=
−2
2
x
=
1
x
=
±
1
(8)
2
−3
x
=
−192
2
x
=
64
x
=
±
8
(9)
2
−2
x
=
−98
2
x
=
49
x
=
±
7
(10)
2
3
x
=
75
2
x
=
25
x
=
±
5
(11)
2
2
x
=
2
2
x
=
1
x
=
±
1
(12)
2
−3
x
=
−108
2
x
=
36
x
=
±
6