Answer:
If you have a vector a = [ax ay az] and b = [bx by bz], both in x-y-z Cartesian space, the dot product a•b is given by:
a•b = axbx + ayby + azbz
So, you have v = [2 -8 -8] and w = [-2 6 -5].
So, v•w = (2)(-2) + (-8)(6) + (-8)(-5) = -4 - 48 + 40 = -12
Step-by-step explanation:
