SOLUTION: prove that (x+y)^3-(x-y)^3-6y(x^2-y^2)=8y^3
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-> SOLUTION: prove that (x+y)^3-(x-y)^3-6y(x^2-y^2)=8y^3
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Question 882425
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prove that (x+y)^3-(x-y)^3-6y(x^2-y^2)=8y^3
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