# math

For the vectors u=(2,-3) and w=(-1,2), calculate |-3u| - |2w|.

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1. if u=(2,-3) then -3u = (-6,9)
and │-3u│ = √(36+81) = √117 = 2√13

and │u│ = √(4+9) = √13

what do you observe?

can you finish it?

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posted by Reiny
2. "and │-3u│ = √(36+81) = √117 = 2√13
"

should have said

and │-3u│ = √(36+81) = √117 = 2√13

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posted by Reiny
3. Argghhhh!

3√13

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posted by Reiny

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