Resistors - not quite ten a penny!

[ppppenguin]

Being too lazy to seek out these odd symbols I usually use the sort of notation usually used in computer languages. Hence I would write V = SQRT(PR) or even V = SQRT(P*R). Not elegant but effective. Likewise I rarely bother with superscripts hence X^2 for X squared and 4.5E-2 for 4.5 times 10 to the power of -2.

I could even use X^0.5 for square root but that's probably going a bit too far for a non-mathematical forum.