(1+根号3)(2-根号3)
=(1+√3)(2-√3)
=2-√3+2√3-3
=√3-1
(根号5+1)(根号5-2)
=5-2√5+√5-2
=3-√5
根号2(根号2+根号8)
=2+√16
=2+4
=6
(2根号3-1)的平方
=12-4√3+1
=13-4√3
(根号3+ 根号3 分之1)的平方
=3+2+1/3
=16/3
(2根号5-1)(2根号5+1)
=20-1
=19
根号2(根号18-根号8)
=√36-√16
=6-4
=2
(-2+根号2)(3-根号2)
=-6+2√2+3√2-2
=-8+5√2
(根号12-根号3)的平方
=12-2√36+3
=12-12+3
=3