mathalon
デイリー
対戦
練習
学ぶ
大会
ランキング
ja
ログイン
登録
すべての単元
2次方程式のプリント
このとおりに印刷されます
2次方程式
レベル3 · 解に根号をふくむ
名前
組
方程式を解きなさい。
1.
x
2
−
6
x
+
6
=
0
x^{2} - 6x + 6 = 0
x
2
−
6
x
+
6
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
2.
x
2
−
12
x
+
22
=
0
x^{2} - 12x + 22 = 0
x
2
−
12
x
+
22
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
3.
x
2
+
2
x
−
18
=
0
x^{2} + 2x - 18 = 0
x
2
+
2
x
−
18
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
4.
x
2
+
10
x
+
11
=
0
x^{2} + 10x + 11 = 0
x
2
+
10
x
+
11
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
5.
x
2
+
12
x
+
26
=
0
x^{2} + 12x + 26 = 0
x
2
+
12
x
+
26
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
6.
x
2
−
12
x
+
33
=
0
x^{2} - 12x + 33 = 0
x
2
−
12
x
+
33
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
7.
3
x
2
−
20
x
+
12
=
0
3x^{2} - 20x + 12 = 0
3
x
2
−
20
x
+
12
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
8.
3
x
2
−
x
−
4
=
0
3x^{2} - x - 4 = 0
3
x
2
−
x
−
4
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
9.
2
x
2
−
5
x
+
3
=
0
2x^{2} - 5x + 3 = 0
2
x
2
−
5
x
+
3
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
10.
3
x
2
+
2
x
−
8
=
0
3x^{2} + 2x - 8 = 0
3
x
2
+
2
x
−
8
=
0
x
1
=
x_1 =
x
1
=
x
2
=
x_2 =
x
2
=
解答
2次方程式 · レベル3 · 解に根号をふくむ
1.
x
=
3
±
3
x = 3 \pm \sqrt{3}
x
=
3
±
3
2.
x
=
6
±
14
x = 6 \pm \sqrt{14}
x
=
6
±
14
3.
x
=
−
1
±
19
x = -1 \pm \sqrt{19}
x
=
−
1
±
19
4.
x
=
−
5
±
14
x = -5 \pm \sqrt{14}
x
=
−
5
±
14
5.
x
=
−
6
±
10
x = -6 \pm \sqrt{10}
x
=
−
6
±
10
6.
x
=
6
±
3
x = 6 \pm \sqrt{3}
x
=
6
±
3
7.
x
1
=
2
3
,
x
2
=
6
x_1 = \frac{2}{3},\; x_2 = 6
x
1
=
3
2
,
x
2
=
6
8.
x
1
=
4
3
,
x
2
=
−
1
x_1 = \frac{4}{3},\; x_2 = -1
x
1
=
3
4
,
x
2
=
−
1
9.
x
1
=
1.5
,
x
2
=
1
x_1 = 1.5,\; x_2 = 1
x
1
=
1.5
,
x
2
=
1
10.
x
1
=
4
3
,
x
2
=
−
2
x_1 = \frac{4}{3},\; x_2 = -2
x
1
=
3
4
,
x
2
=
−
2
デイリー
対戦
練習
学ぶ
大会