1. The problem statement, all variables and given/known data ψ(x)=A((2kx)-(kx)^2) 0≤X≤2/k ψ(x)=0 everywhere else I need to find A 2. Relevant equations ∫|ψ(x)|^2 dx=1 so I know I need to evaluate it between 0 and 2/k 3. The attempt at a solution My problem is do I square the whole ψ(x)? If some one could point me in right direction I would really appreciate it.