Factorise : a3 - b3 .

a3-b3= a3-b3= a-ba2+ab+b2

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(a-b)^3 -3ab(a-b)

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(a-b)(a2+ab+b2).

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a^3-b^3=(a-b)(a^2+ab+b^2)

hope this helps.... Thumbs up please

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