Jawabanmu

2014-02-12T18:09:15+07:00
3x'kuadrat' + (k - 1)x + 9 = 0
3.(3.3) + (k - 1)3 + 9 = 0
27 + 3k - 3 + 9 = 0
33 + 3k = 0
3k = -33
k = -11

CMIIW