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Let f(x,y)=x^(2)+2xy+3y^(2)-6x-2y, whe...

Let `f(x,y)=x^(2)+2xy+3y^(2)-6x-2y,`
where `x, y in R,` then

A

`f(x,y)ge-11`

B

`f(x,y)ge-10`

C

`f(x,y)ge-11`

D

`f(x,y)ge-12`

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