Evaluate, if possible SQRT of -121?

0 ⤊

Evaluate, if possible SQRT of -121?

answer is -99. the square root of -121 is -11 therefore 11*9 -99. I am so confused. Please tell me if I have this correct?

2007-10-25 08:38:44 · 3 answers · asked by chas_lynn2002 2 in Science & Mathematics ➔ Mathematics

3 answers

the answer is worked out thusly
√(-121)
√[(-1) *(121)]
√[(-1) *(11*11)]
11√(-1)
11i

The answers is 11i (the letter 'i' in mathematics is the symbol used to represent √(-1)

ANS: 11√(-1) or 11i

2007-10-25 08:55:29 · answer #1 · answered by David F 5 · 0⤊ 0⤋

â(- 121) = â( i Â² 121) = 11 i

2007-10-25 17:48:23 · answer #2 · answered by Como 7 · 0⤊ 0⤋

The sqrt of -121 is 11j. j is the sqrt of -1. You can rewrite sqrt(-121) as sqrt(-1)*sqrt(121). This is the same as sqrt(-1)*121.

2007-10-25 15:43:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋