if vector u = 3i-2j and vector v= -2i+3j find Ⅱ u-2v Ⅱ ...is the first step correct? click attached http://bamboodock.wacom.com/doodler/1717741b-883c-4d7c-9628-7d88d1379114

Question

anonymous · Answer

you better do it step by step to avoid confusions.

anonymous · Answer

okay what is my first step..here? ><

anonymous · Answer

solve for u and v first then do the |u-2v|

anonymous · Answer

how....?

anonymous · Answer

oh solve them first and then put in  "ll ll"

anonymous · Answer

yep!

anonymous · Answer

thank you!

anonymous · Answer

so i got u-2v = 7i-8j correct?

anonymous · Answer

First compute u-2v:$$(\vec{u}-2\vec{v})=<3-2(-2),-2-2(3)>=<7,-8>$$Now, find the length of this vector...

anonymous · Answer

you mean the magnitude?

anonymous · Answer

same thing

anonymous · Answer

so it looks like this right? √(7)^2+(-8)^2?

anonymous · Answer

i got it thank you so much!!!!!
both to @eseidl  and @hbaldon