Asked by Jack
I Don't Know What Is This Subject Called In English But It's About Complex Numbers
it says
25 = 16 - 9 i^2 = (4 ± 3i)
But My Teacher Says
25 = 25 - 0 i^2 = (5 ± 0i)
I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number Because ( 0i = 0)
So Is My Teacher Wrong Or Not ?
it says
25 = 16 - 9 i^2 = (4 ± 3i)
But My Teacher Says
25 = 25 - 0 i^2 = (5 ± 0i)
I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number Because ( 0i = 0)
So Is My Teacher Wrong Or Not ?
Answers
Answered by
Reiny
both end statements are incorrect
(4 ± 3i) means (4+3i) OR (4-3i)
it has nothing to do with the multiplication of
(4+3i)(4-3i)
which would be
16 - 9i^2
= 16 - (-9)
= 25
your teacher should have said, (probably did)
(5 + 0i)(5-0i)
= 25 - 0i^2
= 25
(4 ± 3i) means (4+3i) OR (4-3i)
it has nothing to do with the multiplication of
(4+3i)(4-3i)
which would be
16 - 9i^2
= 16 - (-9)
= 25
your teacher should have said, (probably did)
(5 + 0i)(5-0i)
= 25 - 0i^2
= 25
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.