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©2024 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[220-00]
(1)
−8
x
(
x
−
10
)
=
0
(2)
−6
x
(
x
−
10
)
=
0
(3)
−10
x
(
x
+
4
)
=
0
(4)
10
x
(
x
+
10
)
=
0
(5)
−4
x
(
x
−
1
)
=
0
(6)
−7
x
(
x
+
10
)
=
0
(7)
−2
x
(
x
−
2
)
=
0
(8)
9
x
(
x
+
3
)
=
0
(9)
6
x
(
x
+
6
)
=
0
(10)
−4
x
(
x
+
10
)
=
0
(11)
−4
x
(
x
−
8
)
=
0
(12)
9
x
(
x
−
5
)
=
0
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−8
x
(
x
−
10
)
=
0
x
=
0
,
10
(2)
−6
x
(
x
−
10
)
=
0
x
=
0
,
10
(3)
−10
x
(
x
+
4
)
=
0
x
=
0
,
−4
(4)
10
x
(
x
+
10
)
=
0
x
=
0
,
−10
(5)
−4
x
(
x
−
1
)
=
0
x
=
0
,
1
(6)
−7
x
(
x
+
10
)
=
0
x
=
0
,
−10
(7)
−2
x
(
x
−
2
)
=
0
x
=
0
,
2
(8)
9
x
(
x
+
3
)
=
0
x
=
0
,
−3
(9)
6
x
(
x
+
6
)
=
0
x
=
0
,
−6
(10)
−4
x
(
x
+
10
)
=
0
x
=
0
,
−10
(11)
−4
x
(
x
−
8
)
=
0
x
=
0
,
8
(12)
9
x
(
x
−
5
)
=
0
x
=
0
,
5