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nisa Group Title

-√3(√-3) help me pleasee

  • one year ago
  • one year ago

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  1. satellite73 Group Title
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    \(\sqrt{-3}=\sqrt{3}i\)

    • one year ago
  2. nisa Group Title
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    i know this is with i agai

    • one year ago
  3. satellite73 Group Title
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    so \[-\sqrt{3}\times \sqrt{3}i=-3i\]

    • one year ago
  4. nisa Group Title
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    ohh so anything with a negative is and imaginary number right

    • one year ago
  5. satellite73 Group Title
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    if you have a negative number inside the radical, then it comes outside as \(i\)

    • one year ago
  6. nisa Group Title
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    yeah because a negative isnt possible in square root

    • one year ago
  7. satellite73 Group Title
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    for example \(\sqrt{-25}=\sqrt{25}i=5i\) and \[\sqrt{-3}=\sqrt{3}i\]

    • one year ago
  8. nisa Group Title
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    i have a few more question like this can i show you and can you tell me if im doing it right?

    • one year ago
  9. nisa Group Title
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    √-25√-9 its going to be 5i 3i right?

    • one year ago
  10. satellite73 Group Title
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    yes, that would be the first step

    • one year ago
  11. satellite73 Group Title
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    the second step would be to actually multiply and get \[5i\times 3i=15i^2=15\times (-1)=-15\]

    • one year ago
  12. nisa Group Title
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    the i goes away?

    • one year ago
  13. satellite73 Group Title
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    yes, because \(i=\sqrt{-1}\) and so \(i^2=-1\)

    • one year ago
  14. nisa Group Title
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    oh that makes sense and im sorry i just have two more if u could please check them as well (6i)2 which would be 36i right but if i multiplied 36 by -1 then i get -36 then theres (2+3)(2-3i) im not sure about this one like is it going to be like 5*2-3(-1) ?

    • one year ago
  15. nisa Group Title
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    thanks for helping me out im stuck with all this and guys are the best :D

    • one year ago
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