-12, 92
-6, 9
6, 9
12, 92
Correct answer is A
12(3y - 4x)2 = (8x2 + kxy + Ly2)
12(9y2 - 24xy + 16x2) = 8x2 + kxy + Ly2
92y2 - 12xy) = kxy + Ly2
k = -12 ∴ L = 92
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