# Solution - Properties of Determinants

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#### Question

Using properties of determinants, prove that

|((x+y)^2,zx,zy),(zx,(z+y)^2,xy),(zy,xy,(z+x)^2)|=2xyz(x+y+z)^3

#### Solution

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|[x+y,x,x],[5x+4y,4x,2x],[10x+8y,8x,3x]|=x^3

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|[b+c,c+a,a+b],[q+r,r+p,p+q],[y+z,z+x,x+y]|=2|[a,b,c],[p,q,r],[x,y,z]|

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|[1,x,x+1],[2x,x(x-1),x(x+1)],[3x(1-x),x(x-1)(x-2),x(x+1)(x-1)]|=6x^2(1-x^2)

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