答:
1)
(√2+1)(2-2√2)+(√50-√8)/√2
=2(1+√2)(1-√2)+√25-√4
=2(1-2)+5-2
=-2+3
=1
2)
(2√6-√2)^2
=(2√6)^2-2*2√6*√2+(√2)^2
=24-8√3+2
=26-8√3
3)题目不明确
(1+√2+√3)+√2*√6
=1+√2+√3+2√3
=1+√2+3√3
答:
1)
(√2+1)(2-2√2)+(√50-√8)/√2
=2(1+√2)(1-√2)+√25-√4
=2(1-2)+5-2
=-2+3
=1
2)
(2√6-√2)^2
=(2√6)^2-2*2√6*√2+(√2)^2
=24-8√3+2
=26-8√3
3)题目不明确
(1+√2+√3)+√2*√6
=1+√2+√3+2√3
=1+√2+3√3