1)
√(27+10√2)+√(11-6√2)=√(25+2*5*√2+2)+√(9-2*3*√2+2)=
=√(5²+2*5*√2+(√2)√+√(3²-2*3*√2+(√2)²)=√(5+√2)²+√(3-√2)²=5+√2+3-√2=8.
2)
2*√(7-4*√3)+√(11-4√3)=2*√(4-2*2*√3+3)+√(1-4*√3+12)=
=2*√(2²-2*2*√3+(√3)²)+√(1²-2*1*2√3+(2√3)²=2*√(2-√3)²+√(1-2√3)²=
2*(2-√3)+|1-2√3|=4-2√3+2√3-1=3.