Question

(2 + √5 ) (2 - √5 ) on simplification gives

Answer 1

Answer:

Answer =-1

................

Answer 2

Answer:

$(x + y)(x - y) = {x}^{2} - {y}^{2}$

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

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

$4 - 5$

$- 1$

Step-by-step explanation:

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