(x+0.5y)(x-0.5y)(x²--0.25y²)

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(x+0.5y)(x-0.5y)(x²--0.25y²)(x+0.5y)(x-0.5y)(x²--0.25y²)(x+0.5y)(x-0.5y)(x²

(x+0.5y)(x-0.5y)(x²--0.25y²)
(x+0.5y)(x-0.5y)(x²--0.25y²)

(x+0.5y)(x-0.5y)(x²--0.25y²)
(x+0.5y)(x-0.5y)(x²--0.25y²)
=(x²-0.25y²)(x²-0.25y²)
=(x²-0.25y²)^2

(x+0.5y)(x-0.5y)(x²--0.25y²)
=(x²+0.25y²)(x²--0.25y²)
=x^4-0.0625y^4