Question

( √5-2) (√5+2) simplify it ​

Answer 1

$( { \sqrt{5} )}^{2} - ({2)}^{2}$

$5 - 4$

$1$

Answer 2

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$( \sqrt{5} - 2)( \sqrt{5} + 2) = (a - b)(a + b) = > {a}^{2} - {b}^{2} \\ { (\sqrt{5}) }^{2} - {2}^{2} \\ 5 - 4 = 1$