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©2025 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
+
3
x
=
0
(2)
2
4
x
+
24
x
=
0
(3)
2
4
x
=
−
2
x
(4)
2
2
x
+
6
x
=
0
(5)
2
5
x
−
25
x
=
0
(6)
2
3
x
+
18
x
=
0
(7)
2
5
x
−
45
x
=
0
(8)
2
2
x
=
−
16
x
(9)
2
3
x
−
27
x
=
0
(10)
2
6
x
+
12
x
=
0
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
2
x
+
3
x
=
0
3
2
x
(
x
+
)
2
=
0
x
3
=
0
,
−
2
(2)
2
4
x
+
24
x
=
0
4
x
(
x
+
6
)
=
0
x
=
0
,
−6
(3)
2
4
x
=
−
2
x
1
4
x
(
x
+
)
2
=
0
x
1
=
0
,
−
2
(4)
2
2
x
+
6
x
=
0
2
x
(
x
+
3
)
=
0
x
=
0
,
−3
(5)
2
5
x
−
25
x
=
0
5
x
(
x
−
5
)
=
0
x
=
0
,
5
(6)
2
3
x
+
18
x
=
0
3
x
(
x
+
6
)
=
0
x
=
0
,
−6
(7)
2
5
x
−
45
x
=
0
5
x
(
x
−
9
)
=
0
x
=
0
,
9
(8)
2
2
x
=
−
16
x
2
x
(
x
+
8
)
=
0
x
=
0
,
−8
(9)
2
3
x
−
27
x
=
0
3
x
(
x
−
9
)
=
0
x
=
0
,
9
(10)
2
6
x
+
12
x
=
0
6
x
(
x
+
2
)
=
0
x
=
0
,
−2