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anonymous

  • one year ago

Find the dot product, a • b. a = 6i + 5j, b = -5i + 4j

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  1. anonymous
    • one year ago
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    whats so hard about this @Nairz 6i+5j*-5i+4j 6i(-5i+4j) +5(5i+4j) can you solve this?

  2. anonymous
    • one year ago
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    I haven't done this in a long time. Just need a refresher :)

  3. anonymous
    • one year ago
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    so are u refreshed now

  4. anonymous
    • one year ago
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    so just simplify that equation you wrote?

  5. cwrw238
    • one year ago
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    remember that i*j = 0

  6. anonymous
    • one year ago
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    yeah multiply it gonna show one 6i(-5i+4j) 6i*-5i + 6i*4j then simply it, do it for both and then add subract, pretty basic

  7. anonymous
    • one year ago
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    and when he says that i x j = 0 does that mean that 6i x 4j = 0? @snoo

  8. anonymous
    • one year ago
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    @cwrw238 pl0x cum

  9. cwrw238
    • one year ago
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    6i x 4j = 24*ij = 24*0 = 0

  10. anonymous
    • one year ago
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    ^

  11. anonymous
    • one year ago
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    do same with other one, @Nairz

  12. myininaya
    • one year ago
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    doesn't <x,y> dot <c,d> mean xc+yd

  13. anonymous
    • one year ago
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    ok thanks @snoo and @cwrw238

  14. anonymous
    • one year ago
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    btw, call me daddy, i'm out :)

  15. myininaya
    • one year ago
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    \[<6,5> \cdot <-5,4>=6(-5)+5(4)\]

  16. anonymous
    • one year ago
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    omg yes.

  17. anonymous
    • one year ago
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    so -30 + 20 or 10

  18. myininaya
    • one year ago
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    well -30+20 is -10

  19. anonymous
    • one year ago
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    oh whoops

  20. anonymous
    • one year ago
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    i forgot to put in the - sign

  21. anonymous
    • one year ago
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    i'm an old man i m sorry i was thinking of multiplying as adding, im so sorry dear

  22. anonymous
    • one year ago
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    true @myininaya

  23. myininaya
    • one year ago
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    I think we all get things a little mixed up sometimes. Math is huge subject after all.

  24. anonymous
    • one year ago
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    thanks dear

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