Question

Calculati: $( \sqrt{8} + \sqrt{5} )( \sqrt{8} - \sqrt{5} =?$

Answer 1

(√8+√5)(√8-√5)=√64-√40+√40-√25=
8-5=3
20-20=0
8-5-0=3
sucees

Answer 2

[tex] (\sqrt8+\sqrt5)(\sqrt8-\sqrt5)=(\sqrt8)^2 - (\sqrt5)^2 =8 - 5 = 3[/tex]