Question 62937
QUESTION:

Find the difference: (1-9i)-(5-i^2-8i)

ANSWER:


We have the value i^2 = -1


So,


Remove the brackets first,



(1-9i)-(5-i^2-8i) = 1 - 9i - 5 + i^2 + 8i
                     
                  = 1 - 9i - 5 + -1 + 8i

                  =  1 - 5 + -1 -9i + 8i

                  =  -5 -1i


Which is the required answer.



Regards.

praseenakos@yahoo.co.in