Question

Which of the following is the correct notation for the complex number sqrt-64-12

a.12-8i
b. 8i+12
c. -12+8i
d. 8i-12

Answer 1

@Omgthatgirl remember that any negative number squared equals an imaginary number. Therefore, square-rooting 64 would give you a positive imaginary number of...:

Answer 2

8

Answer 3

yeah! more precisely, it would be 8i

Answer 4

so if you subtract that by 12, but 8i stays positive, what is your answer?

Answer 5

ok we got that part what about the other

Answer 6

well, i can tell you right now that we can eliminate A because 8i is positive, not negative

and we can eliminate B because 12 is negative, not positive

Answer 7

you think you can figure out the answer from here? @Omgthatgirl

Answer 8

is it 8i-12

Answer 9

actually, the imaginary number goes at the end. it should be -12+8i

Albiet, those equations are basically flipped around, that's the only difference

Answer 10

oh ok thanks!

Answer 11

No problem :)