KCET 2011 Math Solved Paper
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Question : 28 of 60
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If 2 x 2 + 2 y 2 + 4 x + 5 y + 1 = 0 and 3 x 2 + 3 y 2 + 6 x − 7 y + 3 k = 0 are orthogonal, then value of k is .....................
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