|(x,y),( alpha , beta)|=0implies...

`|(x,y),( alpha , beta)|=0implies`

`(x)/(y)+(y)/( beta)=0`

`(x) /(alpha )- (y)/( beta)=0`

` (x)/( y ) (y )/( alpha)=0`

` (x )/(beta)+ (y) /( alpha )=0`

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