Respostas
1) 5x2 - 3x - 2 =
0 (R:
a = 5, b = -3, c = -2)
2) 3x2 +
55 =
0 (R:
a = 3, b = 0, c = 55)
3) x2 - 6x
=
0 (R:
a = 1, b = -6, c = 0)
4) x2 - 10x
+ 25 =
0 (R:
a = 1, b = -10, c = 25)
5) x2 - x - 20 = 0 (R: x’ = 5 e x’’ = -4)
6) x2 - 3x
-4 =
0 (R:
x’ = 4 e x’’ = -1)
7) x2 - 8x
+ 7 =
0 (R:
x’ = 7 e x’’ = 1)
8) x² - 5x + 6 =
0 (R: 2, 3)
9) x² - 8x + 12 = 0 (R:
2, 6)
10) x² + 2x - 8 = 0 (R: 2,
-4)