e. (9k2 - 36k + 36) = (3k - 6)
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9-36 k+36 = 3 k -6
9-39 k+42 = 0
9-18 k -21 k +42 = 0
9 k ( k- 2 ) - 21 (k - 2) = 0
(k-2) (9k-21) = 0
When
k-2=0
k=2 Ans.
When
9k-21=0
k =
k = Ans
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