anonymous
  • anonymous
(−3 + 2i) • (2 + i)
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
Do you know foil?
anonymous
  • anonymous
yeah kinda i guess
anonymous
  • anonymous
that's really all this is. and then when you multiply i * i, it's -1

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anonymous
  • anonymous
ohh okay thank you
anonymous
  • anonymous
no problem. tag me if you need more help or want to get your answer checked
anonymous
  • anonymous
okay imma solve it now
anonymous
  • anonymous
o would be -3i?
anonymous
  • anonymous
no. what did you get when you multiplied, before you combined?
anonymous
  • anonymous
huh
anonymous
  • anonymous
what did you get from foil?
anonymous
  • anonymous
im asking abou the o the f is 6 but i dont know the rest
anonymous
  • anonymous
oh, ok. Sorry, I thought you were saying that the final answer was -3i. That's right for O. F is -6.
anonymous
  • anonymous
okay and i is 4i?
anonymous
  • anonymous
yes
anonymous
  • anonymous
what would L be??
anonymous
  • anonymous
\[2i \times i = 2i^2 = 2(-1) = -2\]
anonymous
  • anonymous
so when you add them all up you have \[-6-3i+4i-2\] and you just have to combine like terms
anonymous
  • anonymous
so the answer is -7?
anonymous
  • anonymous
combine the i's and combine the constants. Don't mix them (-3i + 4i) + (-6 - 2) i - 8 is your answer
anonymous
  • anonymous
or rather -8 + i is the order it's usually written in
anonymous
  • anonymous
okay thank you
anonymous
  • anonymous
you're welcome

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