1. 根号ab(根号a的立方b+根号ab的立方-ab) =根号ab(a根号ab+b根号ab-ab) =a²b+ab²-ab根号ab2.(3倍的根号2+根号48)(根号18-4倍的根号3)=(3根号2+4根号3)(3根号2-4根号3)=(3根号2)²-(4根号3)²=18-48=-303. 根号12+2-(1+根号3)分之1=2根号3+2-(根号3-1)/2=2根号3+2-1/2根号3+1/2=3/2根号3+2.5