Question 962416
solve x^2+4kx-k by completing the square 

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You cannot "solve" if you do not have a equation.
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I'll assume you meant x^2 + 4kx -k = 0
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x^2 + 4kx = k
x^2 + 4kx + (2k)^2 = k + (2k)^2
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(x+2k)^2 = 4k^2+k
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x+2k = +/-sqrt(4k^2+k)
x = -2k +/-sqrt(4k^2+k)
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Cheers,
Stan H.
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