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anonymous

  • 5 years ago

Use the dot product to find the magnitude of u if u = - 3i - 6j.

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  1. anonymous
    • 5 years ago
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    magnitude is just Sqrt[(-3)^2+(-6)^2]

  2. anonymous
    • 5 years ago
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    Oh ok I was using the wrong equation then that would def. explain it How do you do a sqrt with negatives?

  3. anonymous
    • 5 years ago
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    there wouldn't be negative since you are squaring them first

  4. anonymous
    • 5 years ago
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    uh... ok I'm confused sorry

  5. anonymous
    • 5 years ago
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    are you trying to find the sqrt of (-3^2+-6^2) cause you can't find a sqrt with negative numbers....?

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spraguer (Moderator)
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