states that
In any simultaneous determination of the position and momentum of a particle, the product of the uncertainty ∆x in its position and the uncertainty ∆p in its (conjugate) momentum, namely ∆p ∆x is given by
∆p ∆x ≥ ħ/2
For x component (in 3D):
∆px ∆x ≥ ħ/2
THE PRODUCT ∆px ∆x WILL ALWAYS EXCEED ħ/2
NOW:
∆px ∆x ≥ h ≥ h/2 ≥ ħ/2
Note that it's NOT '='
It is '≥'