(3+2√3)a+(4√3-2)b=10-4√3
(3a-2b)+(2v3a+4v3b)=10-4v3
3a-2b=10
2v3a+4v3b=-4v3
解方程得出a,b
{a = 2,b = -2}
a^2=4
b^3=-8
带入即可.