Question

Simplify the square root of -121

Answer 1

11i

Answer 2

\(\sqrt{-121} \)

Remember that when you deal with the square root of a negative number, the answer is imaginary, and you need to use \(\sqrt{-1} = i\).

\(\sqrt{-121} = \sqrt{-1 \times 121} = \sqrt{-1} \times \sqrt{121} = i \times 11 = 11i\)

Answer 3

Hint: You must recognize that this is the square root of a negative number, and that Sqrt(-1) is defined to be a certain quantity. What is that quantity? What is the Sqrt of +121?

Answer 4

thank you guys!