SOLUTION: I know the answer is 25, but im unsure if it's negative or positive. (-5i)^2 the i is the imaginary number, not a variable.

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: I know the answer is 25, but im unsure if it's negative or positive. (-5i)^2 the i is the imaginary number, not a variable.      Log On


   

Question 374008: I know the answer is 25, but im unsure if it's negative or positive.
(-5i)^2
the i is the imaginary number, not a variable.
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
It has been awhile but I think i =-1
so -5*-1=+5^2=+25