brooke1 brooke1

21-05-2014
Mathematics

contestada

expand and simplify the following expression: [tex](a-2b){3}[/tex]

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Аноним Аноним

07-07-2014

[tex](x-y)^3=x^3-3x^2y+3xy^2-y^3\\--------------------------\\(a-2b)^3=a^3-3a^2\cdot2b+3a\cdot(2b)^2-(2b)^3\\\\=a^3-6a^2b+12ab^2-8b^3[/tex]

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