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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
[222-00]
(1)
2
2
x
−
8
x
=
0
(2)
2
4
x
+
8
x
=
0
(3)
2
6
x
+
36
x
=
0
(4)
2
8
x
−
x
=
0
(5)
2
7
x
−
28
x
=
0
(6)
2
7
x
−
63
x
=
0
(7)
2
3
x
=
−
30
x
(8)
2
6
x
−
x
=
0
(9)
2
10
x
−
8
x
=
0
(10)
2
5
x
+
50
x
=
0
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
x
−
8
x
=
0
2
x
(
x
−
4
)
=
0
x
=
0
,
4
(2)
2
4
x
+
8
x
=
0
4
x
(
x
+
2
)
=
0
x
=
0
,
−2
(3)
2
6
x
+
36
x
=
0
6
x
(
x
+
6
)
=
0
x
=
0
,
−6
(4)
2
8
x
−
x
=
0
1
8
x
(
x
−
)
8
=
0
x
1
=
0
,
8
(5)
2
7
x
−
28
x
=
0
7
x
(
x
−
4
)
=
0
x
=
0
,
4
(6)
2
7
x
−
63
x
=
0
7
x
(
x
−
9
)
=
0
x
=
0
,
9
(7)
2
3
x
=
−
30
x
3
x
(
x
+
10
)
=
0
x
=
0
,
−10
(8)
2
6
x
−
x
=
0
1
6
x
(
x
−
)
6
=
0
x
1
=
0
,
6
(9)
2
10
x
−
8
x
=
0
4
10
x
(
x
−
)
5
=
0
x
4
=
0
,
5
(10)
2
5
x
+
50
x
=
0
5
x
(
x
+
10
)
=
0
x
=
0
,
−10