Question

Simplify:

-i21√-25

Question 2 options:

5


-5


5i


-5i

Answer 1

@dtan5457

Answer 2

@jim_thompson5910 all the answers u gave me was correct thank you so much :) but can you please help me with more ?

Answer 3

I'll help with one more. What do you have so far?

Answer 4

what step have i gotten so far ?

Answer 5

yeah

Answer 6

i got -^21 = -1

Answer 7

look at this

http://www.regentsprep.org/regents/math/algtrig/ato6/powerlesson.htm

Answer 8

look at the part "When raising i to any integral power, the answer is always..."

Answer 9

-1 . i , -i or 1

Answer 10

@jim_thompson5910

Answer 11

which one? it tells you how to find out which one it is

Answer 12

its -1

Answer 13

right next to that, it says "Another way to think of this process of simplifying .."

Answer 14

what is the exponent

Answer 15

1

Answer 16

isn't it 21?

Answer 17

but it says if the reminder is a 1 its i

Answer 18

I asked for the exponent though

Answer 19

but I see what you mean

Answer 20

21/4 = 5 remainder 1

Answer 21

\[\Large i^{21} = i\]

\[\Large -i^{21} = -i\]