Question 6252
{X 3 -Y 3 = (X - Y)(X 2 + XY + Y 2 )}
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x^3 - 8 = (x - 2)(x^2 + 2x + 4)
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x^3 - 8 = (x - 2)[(x-2)^2 + 4x]
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x^3 - 8 = (x - 2)^3 + 4x
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Hope this helps