Question

square root of -25 in imaginary form

Answer 1

root (-25) = root(-1) * root(25) 
in imaginary form we know that root(-1) = i 
so root(-25) = 5 i 

Answer 2

remember
√(mn)=(√m)(√n)

and
√-1=i

√-25=(√-1)(√25)=(i)(5)
aswer is +/-5i