anonymous
  • anonymous
Which expression is equal to (5-2i)-(1+3i) A)4+3i B)4+i C)6-5i D)4-5i i think it's A
Mathematics
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anonymous
  • anonymous
Which expression is equal to (5-2i)-(1+3i) A)4+3i B)4+i C)6-5i D)4-5i i think it's A
Mathematics
jamiebookeater
  • jamiebookeater
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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.

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anonymous
  • anonymous
So you'd simplify this exactly like you would multiply out brackets.
anonymous
  • anonymous
I don't even know how to multiply out brackets.
LynFran
  • LynFran
u dont have to multiply out the brackets

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LynFran
  • LynFran
just distribute the negative sign to the second bracket
LynFran
  • LynFran
so we have 5-2i-1-3i
LynFran
  • LynFran
now group like term and simplify
LynFran
  • LynFran
and no its not A
anonymous
  • anonymous
I only thought it was A because if you do 5-2=4 and 1+3=4
LynFran
  • LynFran
but 5-2i arent like term... they can not =4
LynFran
  • LynFran
5-2i-1-3i = 5-1 are like term and -2i-3i are like terms
anonymous
  • anonymous
so it would be 4 and -5
LynFran
  • LynFran
4-5i
anonymous
  • anonymous
Thank you could help me with one more?
LynFran
  • LynFran
ok
anonymous
  • anonymous
Which expression is equal to -2i(4-i) A)8-2i B)-2-8i C)-8-2i D)2-8i
LynFran
  • LynFran
distribute the -2i to the bracket
anonymous
  • anonymous
you do 2x4=8i so it would be 2-8i??
LynFran
  • LynFran
and none of those expressions would equal to that you shd get -2i*4+2i^2 -8i+2i^2
anonymous
  • anonymous
I'm a bet confuse on what should I do??
LynFran
  • LynFran
-2i multiple to 4 = -8i and -2i multiply to -i =2i^2
LynFran
  • LynFran
r u sure u wrote the expression correctly??

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