[latex] \sqrt{8} -2 \sqrt{2} [/latex]

[latex] \sqrt{8} -2 \sqrt{2} =2 \sqrt{2}-2 \sqrt{2}=0 [/latex]

√8 - 2√2 = √2·4 - 2√2 = 2√2 - 2√2 = 0 Ответ: 0 :-)