基础练习
1、(1)x1 = -2 ,x2 = 2
(2)a1 = 0, a2 = 2
2、x² - x = 0 ,x(x - 1),
x ,x - 1 ,0 ,1
3、(1)x1 = 0 ,x2 = -5/3
(2)a1 = a2 = 1/2
(3)x1 = 4 , x2 = 1
(4)x1 = 1/3 ,x2 = -1
4、错,因为x - 1有可能为零.
应为 3x(x - 1) - (x - 1) = 0,(x - 1)(3x - 1) = 0
解得x1 = 1 ,x2 = 1/3
综合运用
5、a = 2 ,x = 7/2
6、(1)y1 = y2 = -5/2
(2)x1 = 3,x2 = 6
(3)x1 = x2 = 3/2