3x² + 7x = -2
1/3, 3
3, 2
-2, -1/3
2: x² - 49 = 0
-7, 7
7
-7
3: x2 + 5x + 4 = 0
4, 1/4
-1, -4
-4, 1
4: 6x2 - 2 = x
-1/2, 2/3
-1, 2/3
2, 1/2
5: x2 - x = 42
-7, 6
6, 7
7, -6
6: x² - 21x - 72 = 0
24, -3
3, 24
8, -3
7: 7x² - 7x - 2x + 2 = 0
1/7, 2
2/7, 1
-2, 2/7
8: 3x² - 2x - 5 = 0
5/3, 1
5/3, -1
1, 3/5
9: 2a² - 9a = 5
5
1, 5
-1/2, 5
10: 33x² - x - 14 = 0
2/3, -7/11
3/2, -7/11
2/3, 7
11: 21x² + 22x - 24 = 0
-4/3, 5/7
-2/3, -12/7
2/3, -12/7
12: 2x2 + 2x = 60
5, -6
6, -5
-3, 5
13: x2 + 16x + 48 = 0
-3, 4
4, 12
-4, -12
14: x3 - x2 - 12x = 0
-3, 4, 0
2, 4, 6
-2, 3, 0
15: 4x² + 8x + 4 = 0
-2
-1
1, 2
2007-04-23
21:45:41
·
4 answers
·
asked by
Anonymous
in
Mathematics