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[" Q.28.Using properties of determinants...

[" Q.28.Using properties of determinants,prove the following: "],[qquad |[x,x+y],[x+2y,x],[x+y,x+2y]quad x+y|=9y^(2)(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)

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