Question

find the square root of complex number 89 - 20√11 i​

Answer 1

Answer:

89-20√11i

=100-11-20√11i

=(10)^2-20√11i-11

=(10)^2-2.10.√11i+(11i)^2

=(10-11i)^2

so square root of 89-20√11i is

(10-11i)