If equations x^2+ 2x + 6 = 0 & ax^2 + x+...

If equations `x^2+ 2x + 6 = 0 & ax^2 + x+ b = 0` have one root in common then evaluate `b + 12a` for `a ,b in R` (A) `7` (B) `9` (C) `8` (D) `6`

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