=a^(3/2)-3asqrt(b)+3sqrt(a)*b-b^(3/2)+2a^(3/2)+b^(3/2)=
=3sqrt(a)*(a-sqrt(a)sqrt(b)+b)
a^(3/2)+b^(3/2)=(a^(1/2))^3+(b^(1/2))^3=
=(sqrt(a)+sqrt(b))*(a-sqrt(a)sqrt(b)+b)
((sqrt(a)-sqrt(b))^3+2a^(3/2)+b^(3/2))/(a^(3/2)+b^(3/2))=
=(3sqrt(a)*(a-sqrt(a)sqrt(b)+b))/(sqrt(a)+sqrt(b))*(a-sqrt(a)sqrt(b)+b)=
=3sqrt(a)/(sqrt(a)+sqrt(b))
3sqrt(a)/(sqrt(a)+sqrt(b)) + 3sqrt(b)/(sqrt(a)+sqrt(b))=
3(sqrt(a)+sqrt(b))/(sqrt(a)+sqrt(b))=3
О т в е т. 3