Jawapan

2016-02-11T22:41:02+08:00
(n+1)+n(3n+30)=0
n+1+3n²+30n=0
3n²+31n+1=0
(x+0.03)(x+10.30)
x=-0.03, x=-10.30
okay.
tolong saya lagi satu soalan
saya da hntr
okayy dah
lagi satu soalan