Jawabanmu

2014-03-02T09:48:48+07:00
2014-03-02T10:13:50+07:00
2x² - x - 15 = 0
( 2x + 5 ) ( x - 3) = 0

2x + 5 = 0
2x = -5
x= -5/2
atau
x - 3 = 0
x = 3