Basic math translation

[leppie]

In italian there are special names for particular kind of (polinomial) equations of degree two, namely given a polinomial equation ax²+bx+c=0 whe call it (I use the italian names)

pura, when b=0 and so it becomes ax²+c=0 (pura=pure,neat,mere)
spuria, when c=0 and so it becomes ax²+bx=0 (spuria=spurious)

We was wondering where those names come from, and the answer could maybe found also considering the existence of similar (o different) terminology in other languages.