Although the square root of a negative number has no real value, it is

Although the square root of a negative number has no real value, it is not necessarily true that equations involving imaginary numbers like these are practically inapplicable

A) equations involving imaginary numbers like these are practically inapplicable
B) equations involving such imaginary numbers have no practical applications - CORRECT
C) equations involving these inapplicable imaginary numbers are practical - misplaced modifier
D) equations involving imaginary numbers such as these are inapplicable practically - awkward
E) there is no practical applications for equations involving such imaginary numbers as these - lengthy and awkward


B is the best option.

It contains 'such' not like and it is short and concise and is in active voice also.