Question

Short Answer: Simplify the following expression; express in terms of i. square root of -121

Answer 1

whats square root of 121 ?

Answer 2

11

Answer 3

good., now
\(\huge \sqrt{-a^2}=\sqrt{-1}\sqrt{a^2}=ia\)
so what will be square root of -121 ?

Answer 4

put a=11

Answer 5

-11

Answer 6

nopes, it should be 11i.

Answer 7

so that is the answer 11i

Answer 8

yup. did u understand how ?

Answer 9

yeah you just take the square root and add i lol

Answer 10

i added i because square root of -1 is i.

Answer 11

and infact i multiplied 11 by i

Answer 12

ok thank you