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## Homework Statement

I'm trying to evaluate the problem below but the Mathematica gives me is in terms of x. Can someone please help me solve this thing.

## Homework Equations

Integrate[((2*A)(E^(-d*((m*x^2)/h) ) ) )^2,x,{x,0,Infinity} ]

## The Attempt at a Solution

The solution Mathematica gives me is (a^2 Sqrt[2 \[Pi]] x)/Sqrt[(d m)/h]

Why is there an "x" in the solution at all?

I'm using Mathematica 6.030