积分:(1,2)(x+2)^2/根号xdx
=积分:(1,2)(x^2+4x+4)/根号(x)dx
=积分:(1,2)(x^(3/2)+4根号(x)+4*x^(-1/2))dx
=2/5*x^(5/2)+8/3*x^(3/2)+8*根号(x)|(1,2)
=16根号3-166/15
(结果你检验一下)