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Mathematics 12 Online
OpenStudy (anonymous):

given vectors u=<3,5> and v=<4,-4>, determine the quantity indicated below: -4u•-2v

OpenStudy (zzr0ck3r):

-4u = <-12, -20> 2v = <8,-8> -4u dot 2v = (-12)8+(-20)(-8)=64

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