Question

(raiz de7+2)(raiz de 7-2) - (raiz de 5 + raizde 3 )(raiz de 5 - raizde3)

Answer 1

(3)(2.24)-(3.97) (0.51)
6.72-2.02
4.7

Answer 2

$( \sqrt{7} +2)( \sqrt{7} -2) - (\sqrt{5} + \sqrt{3} )( \sqrt{5} -\sqrt{3} )$


$( \sqrt{7}) ^{2} - 2^{2} - [(\sqrt{5} ) ^{2} - 3^{2} ]$

$7 - 4 - [5 - 9 ]$

3 - [-4]

3 + 4

7