# What is the dot product of <-1,4,7> and <9,-7,5 > ?

$< - 1 , 4 , 7 > \cdot < 9 , - 7 , 5 > = 26$
$< - 1 , 4 , 7 > \cdot < 9 , - 7 , 5 > = 26$