1.
(1-√2+√3)^2 * (1-√2-√3)^2
=〔(1-√2+√3)^2(1-√2-√3)〕^2
=〔(1-√2)^2-(√3)^2〕^2
=〔3-2√2-3〕^2
=(2√2)〕^2
=8
2.
(3/4√15-√12) / (1/2√3)
=3/2(√15-√12) / √3
=3/2(√5-2)
1.
(1-√2+√3)^2 * (1-√2-√3)^2
=〔(1-√2+√3)^2(1-√2-√3)〕^2
=〔(1-√2)^2-(√3)^2〕^2
=〔3-2√2-3〕^2
=(2√2)〕^2
=8
2.
(3/4√15-√12) / (1/2√3)
=3/2(√15-√12) / √3
=3/2(√5-2)