`bbu = , bbv = ` Find (a) `bbu + bbv`, (b) `bbu - bbv`, and (c) `2bbu - 3bbv`.

For vectors in a coordinate form their linear combinations are also performed by coordinates.

`u= lt2,1gt,` `v= lt1,3gt,`  therefore

(a) `u+v = lt2+1,1+3gt = lt3,4gt,`

(b) `u-v = lt2-1,1-3gt = lt1,-2gt,`

(c) `2u-3v = lt2*2+(-3)*1,2*1+(-3)*3gt = lt1,-7gt.`