Jawabanmu

2014-02-09T20:52:08+07:00
(11k+9) = (5k-9)
(5k-9)       (k+3)
11k^{2} + 42k + 27 = 25k{2} - 90k + 81
14k^{2} - 132k + 54 = 0
7k^{2}  - 66k + 27 = 0
(7k-3) (k-9) = 0
k = 3/7 atau k = 9
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