Access full lesson containing this video at: http://www.yourteacher.com/algebra2/imaginarynumbers.php Students learn that the imaginary number “i” is equal to the square root of -1, which means that i^2 is equal to (the square root of -1) squared, which equals -1. Students also learn to simplify imaginary numbers. For example, to simplify the square root of -81, think of it as the square root of -1 times the square root of 81, which simplifies to i times 9, or 9i. To simplify 11/8i, the first step is to get rid of the “i” in the denominator by multiplying both the numerator and the denominator of the fraction by i, to get 11i/8i^2, and remember that i^2 = -1, so we have 11i/8(-1), or 11i/-8, or -11i/8.
Duration : 0:1:5
[youtube LPq6mMt_LEk]
@mario32 Do you …
@mario32 Do you mean i?
this chick is more …
this chick is more nerd than I can take.
or + or – 5
or + or – 5
Need school help? …
Need school help? Get Some Free! At WhatIsMyGPA^webs^Com, we calculate your GPA and within 24 hours, give you advice on how to step up the game to get to your goal GPA, absolutely free. We are also on chats; On AIM: WhatIsMyGPA On GMAIL Chat: WhatIsMyGPA^at^Gmail^com
would you be able …
would you be able to use 1 in any equation that involves the square root of any number say the square root of 72?
Correct.
Correct.
I’ve checked Google …
I’ve checked Google and Yahoo and both state that both i and -i are solutions to the square root of -1, so it follows that 5i and -5i should be the square roots of -25. If you type (-5i)*(-5i) in Googol, the calculator comes up, displaying the result of -25.
because -5i is not …
because -5i is not a solution.
-5i is also a …
-5i is also a solution. Why was this omitted?
Ok then look up ‘ …
Ok then look up ‘imaginary numbers’ in ANY book on advanced mathematics.
but rmember …
but rmember dibshits write stuff in wikipidia to
its possibal. but …
its possibal. but not logically. thats why its called imaginary
lol – nobody’s …
lol – nobody’s making anything up -logical123 is absolutely correct. Look up ‘imaginary numbers’ in wikipedia if you don’t believe it.
this kid is …
this kid is stupid
This is very …
This is very helpful but personally I found imaginary numbers to be easy.
thanks
thanks
but hes perfectly …
but hes perfectly right
It’s impossible in …
It’s impossible in the Real Number set, but not in the complex or Imaginary sets. It’s basic algebra, really.
what the fuck..
_/- …
what the fuck..
_/-25 is impossible
you cant square root minuses
stop making stuff up
you’re crazy
you’re crazy
what you have to do …
what you have to do is realize that i = square root of -1… then like she says its root -1 (or i) times root 25…. thus 5i is the answer
no, theres 4 ways I …
no, theres 4 ways I is use
i – i squared – i cubed – and i to the 4th power…
and they just repeat after that
good response
good response
engineers use it …
engineers use it for electrical and structural purposes. einstine used it for alot of his theorems
Exactly what is the …
Exactly what is the point of all this and what use is it to our daily lives?