Question 1076188
I'll do one, you do the rest the same way.
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u=(-2,3)
v=(-1,-10)
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2v=2(-1,-10)
2v=(-2,-20)
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2v+u=(-2,-20)+(-1,-10)
2v+u=(-2+(-1),-20+(-10))
2v+u=(-3,-30)