Factorise $a^{3} - b^{3}$.

Factorise $a^{3} - b^{3}$.
  1. $(a - b)(a^{2} + ab + b^{2})$
  2. $(a - b)^{3}$
  3. $(a + b)(a^{2} - ab + b^{2})$
  4. $(a - b)(a^{2} - b^{2})$

Solution

Standard difference of cubes identity.

Asked in: MH-SSC-9

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