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If x=2 is a zero of polynomial ax^(2)-bx...

If x=2 is a zero of polynomial `ax^(2)-bx+2`, then what is the relation between a and b?

A

`2a-b+1=0`

B

`a+b+1=0`

C

`a-b+1=0`

D

`7a-5b+1=0`

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