Answer:
The value of a.b is -34.
Step-by-step explanation:
Since, the dot product of two vectors [tex]A(a_1,a_2)[/tex] and [tex]B(b_1,b_2)[/tex] is,
[tex]A.B=a_1b_1+a_2b_2[/tex]
Given vectors,
a=(2,-8) and b=(-1,4),
Thus, the dot product of vectors a and b,
[tex]a.b = 2 \times (-1) + (-8)\times (4) = -2 - 32 = - 34[/tex]
