Q 2419767610.     If the equation `x ^2 + ix + a= 0, x ^2-2x + ia = 0`, `a ne 0` have a common root, then

BCECE 2011 Stage 1
A

`a`is real

B

`a=1//2+i`

C

`a=1//2-i`

D

the other root is also common

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