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for example the length of 3i+4j is
\[ \sqrt{3^2+4^2} = \sqrt{9+16}= \sqrt{25} = 5\]

hey thank you for that a answer can you show me how you got got the length of the vector

what did you get for u+v?

wait i misunderstood i thought that was the same thing. im so confused

first add corresponding terms gives us... i+2j ?

idk how to find the length of a vector

-4i + 1j
4i + 1j

-4i + 4i is not i

its 0?

i dont understand the whole vector and scalar thing

yes, the i's "go away"
you are left with 2j

which is positive points?

okay so U is a vector and length would be to the point.

oh okay i didnt see your message

u+v = 2j (or 0i+2j, or (0,2) )
in a graph it looks like this
|dw:1443635111360:dw|

|dw:1443635167339:dw|

oh cool good so our drawings of vthis match okay so 0^2 because we have no i left and 2^2 becayse 2j