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If x^2+k(4x+k-1)+2=0 has equal roots...

If `x^2+k(4x+k-1)+2=0` has equal roots, then `k=` (a) `-2/3,\ 1` (b) `2/3,\ -1` (c) `3/2,1/3` (d) `-3/2,\ -1/3`

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