If A=4x^2+y^2-6xy B= 3y^2+12x^2+8xy then...

If `A=4x^2+y^2-6xy B= 3y^2+12x^2+8xy` then A-B=___________?

A

`8x^2-2y^2-14xy`

B

`-8x^2-2y^2-14xy`

C

`-8x^2+2y^2-14xy`

D

`-8x^2-2y^2+14xy`

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