Răspuns: [tex]\purple{\boxed{\bf \big(5+\sqrt{8}\big) ~< ~8,7}}[/tex]
Explicație pas cu pas:
[tex]\bf 5+\sqrt{8}= 5+\sqrt{2^{3}} =5+\sqrt{2\cdot 2^{2}} =5+2\cdot\sqrt{2} =5+2\cdot1,4142=[/tex]
[tex]\bf 5+2,8284 = \red{\underline{7,8284}}[/tex]
[tex]\purple{\boxed{\bf 7,8284 ~< ~8,7}}\implies\purple{\boxed{\bf \big(5+\sqrt{8}\big) ~< ~8,7}}[/tex]
