Factorise $a^{2} - 16b^{2}$.

Factorise $a^{2} - 16b^{2}$.
  1. $(a - 4b)(a + 4b)$
  2. $(a - 16b)(a + b)$
  3. $(a - 4b)^{2}$
  4. $(a + 4b)^{2}$

Solution

$a^{2} - (4b)^{2}$.

Asked in: MH-SSC-9

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