数学题。。。要过程!!!
(√2+1)² (2√3-√2)² (1-2√3)(1+2√3))-(2√3-1)²
(√2+1)²
=2+1+2√2
=3+2√2
(2√3-√2)²
=12+2-4√6
=14-4√6
(1-2√3)(1+2√3)-(2√3-1)²
=1-12-(12+1-4√3)
=-11-13+4√3
=-24+4√3
(√2+1)²
=(√2)²+2√2+1
=3+2√2
(2√3-√2)²
=(2√3)²-2X2√3X√2+(√2)²
=12-4√6+2
=14-4√6
(1-2√3)(1+2√3)-(2√3-1)²
=1²-(2√3)²-[(2√3)²-2X2√3+1²}
=1-12-12+4√3-1
=-24+4√3
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