Answer
(7, 0, -4)
Work Step by Step
$u−v+2w=(1,2,3)−(2,2,−1)+2\times(4,0,-4)$
$=(1,2,3)−(2,2,−1)+(8,0,-8)$
$=(1−2+8,2−2+0,3−(−1)-8)$
$=(7, 0, -4)$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.