$(\sqrt{2} + \sqrt{3})(\sqrt{2} - \sqrt{3})$ equals

$(\sqrt{2} + \sqrt{3})(\sqrt{2} - \sqrt{3})$ equals
  1. $-1$
  2. $5$
  3. $1$
  4. $\sqrt{5}$

Solution

$(a+b)(a-b) = a^{2} - b^{2} = 2 - 3 = -1$.

Asked in: MH-SSC-9

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