Answer
$a•b=-1$
Work Step by Step
$a•b=a_{x}b_{x}+a_{y}b_{y}+a_{z}b_{z}$
$=(6)(2)+(-2)(5)+(3)(-1)$
$=-1$
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.