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Find the value(s) of k for which the quadratic equation `x^(2) + 2sqrt(2)kx + 18 = 0` has equal roots.

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Find the value(s) of k for which the quadratic equation `x^(2) + 2sqrt(2)kx + 18 = 0` has equal roots.
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`D = (2sqrt(2k))^(2) - 4(1)(18) = 0 rArr k = pm 3`
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