Question

Find a . b if a=(2, -8) and b = (-1, 4).

a. -30
b. (1, -4)
c. -34
d. (-2, -32)

Answer 1

(2,-8)*(-1,4)

a*b

the answer is (-2,-32)

(2)*(-1)=(-2)

(-8)*(4)=(-32)

Explanation:

hope this helps you :)