Math, asked by anubhasinha1989, 1 year ago

2x-5y whole cube minus2x+5y whole cube

Answers

Answered by chaurasiavikas2014
1
(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)


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