2x-5y whole cube minus2x+5y whole cube
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(2x-5y) ^3-(2x+5y)^3
={(2x) ^3-(5y) ^3-3×2x×5y(2x-5y)}-{(2x) ^3+(5y) ^3+3×2x×5y(2x+5y)}
={8x^3-125y^3-30xy(2x-5y)}-{8x^3+125y^3+30xy(2x+5y)}
=8x^3-125y^3-60x^2y-150xy^2-8x^3-125y^3-60x^2y-150xy^2
=-120x^2y-300xy^2
=-60xy(2x+5y)
I hope you understand.
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={(2x) ^3-(5y) ^3-3×2x×5y(2x-5y)}-{(2x) ^3+(5y) ^3+3×2x×5y(2x+5y)}
={8x^3-125y^3-30xy(2x-5y)}-{8x^3+125y^3+30xy(2x+5y)}
=8x^3-125y^3-60x^2y-150xy^2-8x^3-125y^3-60x^2y-150xy^2
=-120x^2y-300xy^2
=-60xy(2x+5y)
I hope you understand.
Mark me as brainliest
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