Find the values of k for which the given equation has real root 9x2 + 2kx +4 =0 s
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discriminant>=0
4 k.k- 4.4.9 >=0
k.k - 36>=0
k>= 6
4 k.k- 4.4.9 >=0
k.k - 36>=0
k>= 6
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