Question 687937
You cannot take the square root of a negative number and get a real number. 


So {{{-sqrt(-25)}}} = no real number


However, if you have learned about complex numbers, then


{{{-sqrt(-25)}}}


{{{-sqrt(-1*25)}}}


{{{-sqrt(-1)*sqrt(25)}}}


{{{-i*5}}}


{{{-5i}}}


So {{{-sqrt(-25)=-5i}}}