If the given equation ax^2+bx+c=0 and th...

If the given equation `ax^2+bx+c=0` and the equation `x^2+2x+9=0` have a common root, then a:b:c is (A) `1:2:9` (B) `1:2:3` (C) `1:1:1` (D) none of these

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