know I'm missing something obvious.(adsbygoogle = window.adsbygoogle || []).push({});

for a momentum operatorp= -iħ d/dx

if I square the -iħ part I get (+1)ħ^{2}

but I believe the correct value (as in the kinetic energy of the Hamiltonian) is

-ħ/2m d^{2}/dx^{2}.

how is the value of the term -ħ/2m where the square of -i = +1?

Thanks!

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# Square of a momentum operator

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