Jawabanmu

2014-01-18T13:43:14+07:00
1 - (-4) / 2 akar 1 = 5 / 2  
 
solved!
2014-01-18T20:08:20+07:00
Akar 4x2+x-1 - akar 4x2-4x+1 jadi pake rumus b-q per 2 akar a jadi jawabannya -3/4