book Maths Puzzle Numerical Ability

i need help on my homework so here it is- 2(x+y+2)

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book Other Question

Find an orthogonal basis of the following subspace L = span (v1,v2,v3), where v1=(0,0,1,1), v2=(1,0,1,0), v3=(0,1,-1,-1) is -4/-17 =<> than -5/2