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If equation x^2-(2+m)x+1(m^2-4m+4)=0 has...

If equation `x^2-(2+m)x+1(m^2-4m+4)=0` has coincident roots then (A) `m=0, m=1` (B) `m=0, m=2` (C) `m=2/3, m=6` (D) `m=2/3, m=1`

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