$x^{2} + (a + b)x + ab$ factors as

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

Solution

Standard identity.

Asked in: MH-SSC-9

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