>>> from equacions import es_solucio

>>> es_solucio(1.0,-2.0,0.36,1.8,0.0001)
True
>>> es_solucio(2.0,-4.5,1.0,0.25,0.0001)
True
>>> es_solucio(2.0,-4.5,1.0,1.0,0.0001)
False