(√3+√2)乘(√3-√2)乘√2加(√8)的负1平方=(3-2)x√2+√1/8=1x√2+1/4√2=√2+1/4√2=5/4√2
(√3+√2)×(√3-√2)×√2﹢(1/√8)²=(3-2)×√2×1/8=√2/8
4