Răspuns:
[tex]2 \sqrt{160} - 3 \sqrt{90} + 5 \sqrt{40} = \\ \\ = 2 \times 4 \sqrt{10} - 3 \times 3 \sqrt{10} + 5 \times 2 \sqrt{10} = \\ \\ = 8 \sqrt{10} - 9 \sqrt{10} + 10 \sqrt{10} = \\ \\ = - \sqrt{10} + 10 \sqrt{10} = \\ \\ = 9 \sqrt{10} [/tex]
Succes! ♡︎♥︎♡︎
