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Verified answer
A. vektor ab= b-aab=(-3,3)-(3,2)=-6,1
ac=(4,5)-(3,2)=1,3
cb=(-3,3)-(4,5)=-7,-2
3ab+2ac-5cb
3(-6,1)+2(1,3)-5(-7,-2)
(-18+2+35,3+6+10)
(19,19)
b.vektor ab=-6,1