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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
[221-00]
(1)
(
x
+
4
)
(
x
−
2
)
=
0
(2)
(
x
+
2
)
(
x
+
1
)
=
0
(3)
(
x
+
7
)
(
x
−
6
)
=
0
(4)
(
x
−
7
)
(
x
+
4
)
=
0
(5)
(
x
−
9
)
(
x
−
4
)
=
0
(6)
(
x
−
10
)
(
x
+
3
)
=
0
(7)
(
x
+
2
)
(
x
+
1
)
=
0
(8)
(
x
−
2
)
(
x
+
3
)
=
0
(9)
(
x
−
7
)
(
x
+
8
)
=
0
(10)
(
x
−
8
)
(
x
−
6
)
=
0
(11)
(
x
+
7
)
(
x
+
2
)
=
0
(12)
(
x
−
9
)
(
x
−
2
)
=
0
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
(
x
+
4
)
(
x
−
2
)
=
0
x
=
−4
,
2
(2)
(
x
+
2
)
(
x
+
1
)
=
0
x
=
−2
,
−1
(3)
(
x
+
7
)
(
x
−
6
)
=
0
x
=
−7
,
6
(4)
(
x
−
7
)
(
x
+
4
)
=
0
x
=
7
,
−4
(5)
(
x
−
9
)
(
x
−
4
)
=
0
x
=
9
,
4
(6)
(
x
−
10
)
(
x
+
3
)
=
0
x
=
10
,
−3
(7)
(
x
+
2
)
(
x
+
1
)
=
0
x
=
−2
,
−1
(8)
(
x
−
2
)
(
x
+
3
)
=
0
x
=
2
,
−3
(9)
(
x
−
7
)
(
x
+
8
)
=
0
x
=
7
,
−8
(10)
(
x
−
8
)
(
x
−
6
)
=
0
x
=
8
,
6
(11)
(
x
+
7
)
(
x
+
2
)
=
0
x
=
−7
,
−2
(12)
(
x
−
9
)
(
x
−
2
)
=
0
x
=
9
,
2