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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    So you'd simplify this exactly like you would multiply out brackets.

  2. anonymous
    • one year ago
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    I don't even know how to multiply out brackets.

  3. LynFran
    • one year ago
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    u dont have to multiply out the brackets

  4. LynFran
    • one year ago
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    just distribute the negative sign to the second bracket

  5. LynFran
    • one year ago
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    so we have 5-2i-1-3i

  6. LynFran
    • one year ago
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    now group like term and simplify

  7. LynFran
    • one year ago
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    and no its not A

  8. anonymous
    • one year ago
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    I only thought it was A because if you do 5-2=4 and 1+3=4

  9. LynFran
    • one year ago
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    but 5-2i arent like term... they can not =4

  10. LynFran
    • one year ago
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    5-2i-1-3i = 5-1 are like term and -2i-3i are like terms

  11. anonymous
    • one year ago
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    so it would be 4 and -5

  12. LynFran
    • one year ago
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    4-5i

  13. anonymous
    • one year ago
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    Thank you could help me with one more?

  14. LynFran
    • one year ago
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    ok

  15. anonymous
    • one year ago
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    Which expression is equal to -2i(4-i) A)8-2i B)-2-8i C)-8-2i D)2-8i

  16. LynFran
    • one year ago
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    distribute the -2i to the bracket

  17. anonymous
    • one year ago
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    you do 2x4=8i so it would be 2-8i??

  18. LynFran
    • one year ago
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    and none of those expressions would equal to that you shd get -2i*4+2i^2 -8i+2i^2

  19. anonymous
    • one year ago
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    I'm a bet confuse on what should I do??

  20. LynFran
    • one year ago
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    -2i multiple to 4 = -8i and -2i multiply to -i =2i^2

  21. LynFran
    • one year ago
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    r u sure u wrote the expression correctly??

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