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:P thanks haha :=)

show ur work plz :=)

your welcome! I hope you get many medals :)
|dw:1441041648467:dw|
|dw:1441041814049:dw|

to foil two parentheses box method would be great/neat |dw:1441042176623:dw|i times -i = ??

when you multiply same bases you should `add` their exponents

okay i remember here is rule a while ago but i cant remember it that well.

i is same as i to the one power
so \[\huge\rm i^1 \times i^1=??\]

no there is an exponent
`invisible one`

i is same as i^1

okay

so my negative i should be squared then your suposed to take (-1) (-i) i^2

to make it with out its exponent

multiply i times i which is i^2
and i^2 =what ?

i?

\[\large\rm i=\sqrt{-1}~~~~~~~so~~i^2=?\]

so is it just -1? im still confused

yes right i^2=-1

you should remember 4 cycle of i \[\rm i=\sqrt{-1}\]\[\rm i^2=-1\] \[\rm i^3=-i\]\[\rm i^4=1\]

so the answer should be 63?

if you know that then you can find i^999

nope

i have no clue

it's |dw:1441043195360:dw|
i times -1
forgot the negative

i times -i**

|dw:1441043278896:dw|
i^2=-1
now distribute -(-1) then combine them

you gotta be careful about signs especially negative

so 64 -(-1) = 64+1 = 65

\(\huge\color{green}{\checkmark}\)

great job!

okay let me check it on my math lab

you rock!!

aww congrats!
so are u going to take calculus one right ?
good luck!

at GGC

ohh okay

the prob was (2+7i)^2 and they want me to use foil i got 4+77i which is not correct

(2+7i)^2 is same as (2+7i)(2+7i)
now foil!

okay im gonna go step by step with how i got 4+77i

alright so plz show ur work :=)

|dw:1441044467368:dw|

|dw:1441044870538:dw|

okay so instead it is 4+28i+49 then i would add the 4+49
= 53+28i?

no it's \[\huge\rm 4+28i+49i^2=4+28i+49(-1)\] 49 is positive before u distribute by negative on

ah okay the signs get me again. then this should be -45+28i

looks good!

okay one moment

okay

your name proves you well you are definatly the human calculator (: it was correct

Lol well your help has worked wonders i will talk to you again later. Thank you!!

okay :D

& my pleasure :=)