Question

Double check my Math Question?

Evaluate the dot product (2, 4) and (1, -2)



My answer comes out (2, 2), is that right?

Answer 1

-6

Explanation:

You are finding the dot product of vectors <2, 4> and <1, -2>. Recall that the dot product is a SCALAR. In this case <2, 4> · <1, -2> = 2(1) + 4(-2)>, or

2 - 8, or -6.