va rog am nevoie urgent

Răspuns:
2.
[tex] |7 \sqrt{6} | > 0[/tex]
[tex]7 \times 1.41 \times 1.73 = 17.07[/tex]
3.
[tex] \sqrt{20} - \sqrt{5} = 2 \times 5 \sqrt{2} - \sqrt{5} = [/tex]
[tex] = 10 \times 1.41 - 2.23 = 14.10 - 2.23 = 11.87[/tex]