Mathhelp346
  • Mathhelp346
PLEASEE HELP PLEASE!!!: 1. (-1+i √5)^2 2. (2-3i √2)^2
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
are they supposed to be equal?
Mathhelp346
  • Mathhelp346
No, they're two seperate problems
Mathhelp346
  • Mathhelp346
Sorry for the confusion

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
no problem hang on a sec kk?
Mathhelp346
  • Mathhelp346
Ok, thanks
anonymous
  • anonymous
the first one should be i*4.84 the second should be i*1.96
Mathhelp346
  • Mathhelp346
How did you figure those out?
Mathhelp346
  • Mathhelp346
I checked the answers at the back of my textbook and it says -4-2i√5. Is that the same thing?
anonymous
  • anonymous
yes but more complicated(:
Mathhelp346
  • Mathhelp346
Oh, ok. But how did you get those answers anyways?
anonymous
  • anonymous
step by step lol your book should tell you
Mathhelp346
  • Mathhelp346
It doesn't have an example on this type. I don't know how to solve it with a square root.
anonymous
  • anonymous
What?
Mathhelp346
  • Mathhelp346
Can you show me how you solved it step by step?
anikay
  • anikay
I can!
Mathhelp346
  • Mathhelp346
Ok :o
anikay
  • anikay
only cuz of your adorable pikachus though :D
Mathhelp346
  • Mathhelp346
xD Thank you
anikay
  • anikay
do you know what \[i^2 \] is?
Mathhelp346
  • Mathhelp346
yes -1
anikay
  • anikay
ok, so..... \[(-1+i+\sqrt{5})^2\] that's it?
Mathhelp346
  • Mathhelp346
That's it?
anikay
  • anikay
is that the problem in your book?
Mathhelp346
  • Mathhelp346
\[(-1+i \sqrt{5})^{2}\]
Mathhelp346
  • Mathhelp346
It's that
anikay
  • anikay
ok thanks
anikay
  • anikay
so we square everything inside the parentheses. to get -4
anikay
  • anikay
because -1^2 = 1 and i^2 = -1 and sqrt(5)^2 = 5 right?
Mathhelp346
  • Mathhelp346
Yeah
anikay
  • anikay
so the answer should be -4.....imo
anikay
  • anikay
is there something about the problem I'm missing?
Mathhelp346
  • Mathhelp346
But the answers in my textbook say it's -4-2i√5. Or is your answer and the textbook's the same thing?
anikay
  • anikay
they aren't
anikay
  • anikay
mine is simplifying the expression..... is that what your book is asking for
Mathhelp346
  • Mathhelp346
The textbook says multiply
anikay
  • anikay
....omg I'm so sorry
anikay
  • anikay
*facepalm* I'm tired. gonna head to bed after I finish helping you
anikay
  • anikay
\[(-1+i \sqrt{5})(-1+i \sqrt{5})\]
anikay
  • anikay
foil
Mathhelp346
  • Mathhelp346
1+i√5^2?
anikay
  • anikay
ok, F.O.I.L. Front, Outside, Inside, Last
anikay
  • anikay
so first we multiply -1 by -1
anikay
  • anikay
ok we get 1 next we mutiply \[-1*i \sqrt{5}\]
anikay
  • anikay
then we do the same thing again for the inside terms
anikay
  • anikay
then the last, which is \[i \sqrt{5}*i \sqrt{5}\]
anikay
  • anikay
so all together, we get\[1- i \sqrt{5} - i \sqrt{5} - 5\] which simplifies to \[-4 -2i \sqrt{5}\]
Mathhelp346
  • Mathhelp346
oh ok thank you
anikay
  • anikay
so F.O.I.L, gotta remember that :P
Mathhelp346
  • Mathhelp346
Ok ^-^ Good night
anikay
  • anikay
here's a picture, just for good measure |dw:1355203674722:dw|
anikay
  • anikay
night

Looking for something else?

Not the answer you are looking for? Search for more explanations.