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" (iii) "|[x+y,x,x],[5x+4y,4x,2x],[10x+8...

" (iii) "|[x+y,x,x],[5x+4y,4x,2x],[10x+8y,8x,3x]|=x^(3)

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Prove that: |[x+y,x,x],[5x+4y,4x,2x],[10x+8y,8x,3x]|=x^3 .

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If x=-2 and Delta=|(x+y,x,x),(5x+4y,4x,2x),(10x+8y,8x,3x)| then numerical value of Delta is