Jawabanmu

2014-06-02T08:13:44+07:00
1. 
x1 + x2 = 5 + (-2) = 3
x1.x2 = 5.(-2) = -10
PK:
x² - (x1 + x2)x + x1x2 = 0
x² - 3x - 10 = 0