=[(√2-3)(√2+3)]?/3
=(2-3)?/3
=1/3
2.根號(根號3-2)^2+(根號3-1)^0
=√(2-√3+1)
=√(3-√3)
3.利用冪的形式計算:
(3^1/2×5^1/2)^4
=(15?)^4
=15?
=225
4.(根號5-2)^2-(根號5+2)^2
=(√5-2-√5-2)(√5-2+√5+2)
=-8√5
5.(16^-3×4^3)^1/6
=(4^-6*4^3)^1/6
=(2^-6)^1/6
=2^-1
=1/2
6.-81^3/4÷2^3+(16/49)^-1/2-1
=-3?÷8+7/4-1
=-9/8+14/8-8/8
=-3/8
7.(7^3/2×49^-3/4)^2/3
=7×49^-1/2
=7×1/7
=1