满意请采纳
(√48-3√2)(√18+4√3)-(√3-√2)^2=(4√3-3√2)(3√2+4√3)-(√3-√2)^2=(4√3-3√2)(4√3+3√2)-(√3-√2)^2=48-18 -( 1 - 2√6)=29+2√6
