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PLEASEE HELP PLEASE!!!: 1. (-1+i √5)^2 2. (2-3i √2)^2

Mathematics
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are they supposed to be equal?
No, they're two seperate problems
Sorry for the confusion

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Other answers:

no problem hang on a sec kk?
Ok, thanks
the first one should be i*4.84 the second should be i*1.96
How did you figure those out?
I checked the answers at the back of my textbook and it says -4-2i√5. Is that the same thing?
yes but more complicated(:
Oh, ok. But how did you get those answers anyways?
step by step lol your book should tell you
It doesn't have an example on this type. I don't know how to solve it with a square root.
What?
Can you show me how you solved it step by step?
I can!
Ok :o
only cuz of your adorable pikachus though :D
xD Thank you
do you know what \[i^2 \] is?
yes -1
ok, so..... \[(-1+i+\sqrt{5})^2\] that's it?
That's it?
is that the problem in your book?
\[(-1+i \sqrt{5})^{2}\]
It's that
ok thanks
so we square everything inside the parentheses. to get -4
because -1^2 = 1 and i^2 = -1 and sqrt(5)^2 = 5 right?
Yeah
so the answer should be -4.....imo
is there something about the problem I'm missing?
But the answers in my textbook say it's -4-2i√5. Or is your answer and the textbook's the same thing?
they aren't
mine is simplifying the expression..... is that what your book is asking for
The textbook says multiply
....omg I'm so sorry
*facepalm* I'm tired. gonna head to bed after I finish helping you
\[(-1+i \sqrt{5})(-1+i \sqrt{5})\]
foil
1+i√5^2?
ok, F.O.I.L. Front, Outside, Inside, Last
so first we multiply -1 by -1
ok we get 1 next we mutiply \[-1*i \sqrt{5}\]
then we do the same thing again for the inside terms
then the last, which is \[i \sqrt{5}*i \sqrt{5}\]
so all together, we get\[1- i \sqrt{5} - i \sqrt{5} - 5\] which simplifies to \[-4 -2i \sqrt{5}\]
oh ok thank you
so F.O.I.L, gotta remember that :P
Ok ^-^ Good night
here's a picture, just for good measure |dw:1355203674722:dw|
night

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