geekfromthefutur
  • geekfromthefutur
Need help plz been stuck on this for awhile cant find anything to help give medal and fan
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
geekfromthefutur
  • geekfromthefutur
just_gymnast_me
  • just_gymnast_me
Cant read too blurry
geekfromthefutur
  • geekfromthefutur
ok

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geekfromthefutur
  • geekfromthefutur
Find the square of each imaginary number. 1.-3i 2.\[i \sqrt{3}\] 3.\[2i \sqrt{5}\]
geekfromthefutur
  • geekfromthefutur
|dw:1442971089070:dw|
anonymous
  • anonymous
This is the basic fact you need to start with: \[i=\sqrt{-1}\] From there we get \[i^2=-1\]
anonymous
  • anonymous
1. (-3i)² = (-3)²(i)² = 9(-1) = -9 make sense?
geekfromthefutur
  • geekfromthefutur
Oh ok cuz the 2 is saying 3 x 3=9
anonymous
  • anonymous
right
geekfromthefutur
  • geekfromthefutur
Ok so lets c if i can get the 2nd one and u check it if u want
anonymous
  • anonymous
ok
geekfromthefutur
  • geekfromthefutur
Wouldt it be the same since its 3 as well but negitive
anonymous
  • anonymous
right it's -3
geekfromthefutur
  • geekfromthefutur
Sweet
geekfromthefutur
  • geekfromthefutur
ok so 3 would be like 5x5 since theres a 2 or it would be that and 2x2 because they all have the exponent of 2
anonymous
  • anonymous
they would all have the exponent
geekfromthefutur
  • geekfromthefutur
ok so it will be 5x5 and 2x2
anonymous
  • anonymous
√5 * √5 and 2*2
geekfromthefutur
  • geekfromthefutur
what does that sign mean againt not the * sign but doesn't that mean divide
geekfromthefutur
  • geekfromthefutur
*again
anonymous
  • anonymous
that's the square root sign. it basically cancels the exponent
geekfromthefutur
  • geekfromthefutur
oh ok
anonymous
  • anonymous
|dw:1442971897707:dw|
geekfromthefutur
  • geekfromthefutur
ok so -20
anonymous
  • anonymous
yep
geekfromthefutur
  • geekfromthefutur
alrighty the 4th one seems a little confusing
geekfromthefutur
  • geekfromthefutur
|dw:1442972072833:dw| ??
anonymous
  • anonymous
it's the same deal. the square root just cancels the exponent and leaves the number|dw:1442972135034:dw|
geekfromthefutur
  • geekfromthefutur
oh ok
geekfromthefutur
  • geekfromthefutur
Ty for your help i really needed this
anonymous
  • anonymous
sure no problem
anonymous
  • anonymous
you got the last one?
geekfromthefutur
  • geekfromthefutur
Yea i can just copy the last one its just change in didgets and same format lookin
geekfromthefutur
  • geekfromthefutur
digits
anonymous
  • anonymous
true

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