If both (x+2) and (2x + 1) are factors of (ax2 +2x +b ) , then the value of a-b is

If both (x+2) and (2x + 1) are factors of (ax2 +2x +b ) , then the val

1.	If both (x+2) and (2x + 1) are factors of (ax2 +2x +b ) , then the value of a-b is
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