Posted by centya on .
e=square root d/ab,make d the subject

maths 
Steve,
or, as we say in English, "solve for d"
e = √d/ab
eab = √d
(eab)^2 = d
if you were careless with parentheses, and meant
e = √(d/ab)
e^2 = d/ab
abe^2 = d