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[[x,y,x+y],[y,x+y,x],[x+y,x,y]]...

[[x,y,x+y],[y,x+y,x],[x+y,x,y]]

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Using properties of determinants, prove the following |[x,x+y,x+2y],[x+2y,x,x+y],[x+y,x+2y,x]|=9y^2(x+y)

Using properties of determinants, prove the following |[x,x+y,x+2y],[x+2y,x,x+y],[x+y,x+2y,x]|=9y^2(x+y)

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The value of |(x+y,y+z,z+x),(x,y,z),(x-y,y-z,z-x)|=

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