Factorise $x^{3} + 27$.

Factorise $x^{3} + 27$.
  1. $(x+3)(x^{2} - 3x + 9)$
  2. $(x-3)(x^{2} + 3x + 9)$
  3. $(x+3)^{3}$
  4. $(x+9)(x^{2}+3)$

Solution

$a^{3} + b^{3} = (a+b)(a^{2} - ab + b^{2})$.

Asked in: MH-SSC-9

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