Explain why the vectors a=(-2,3) and b=(3,-1) = (13,9)

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Homework Statement



explain why the vectors a=(-2,3) and b=(3,-1) = (13,9)

how do i do this
 
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I don't think you wrote the question correctly. (3,-1) does not equal (13,9).
 


nope, that's wht it says on my assignment paper, ill ask my teacher tomorrow