Question

evaluate the dot product of (-1,2) and (3,3)

Answer 1

well, multiply and add ...

Answer 2

(-1,2)
( 3,3)
-----
-3+6 = ??

Answer 3

3

Answer 4

then 3 it is .....

Answer 5

oh thanks i din't know how to do it

Answer 6

in general, given two point (a,b) and (n,m)

multiply the component parts

a , b
n , m
-----
an bm


then add them together

a , b
n , m
-----
an + bm

Answer 7

good lcuk :)