① 1/（√2-1）+√3(√3﹣√6)+√8=√2+1+3-3√2+2√2=4②[(2/3)x√9x＋6x√(y/x)]＋[(y√﹙x/y﹚﹣x²√(1/x)]=2x√x＋6√xy+√xy-x√x=7√xy+x√x③(1/10) √200 - 2√0.08 - 4√0.5 + (2/5)√72=√2-2√(8/100)-4√(1/2)+2/5√(2*36)=√2-2/5√2-2√2+12/5√2=√2
