Question

Find a * b.
a = 5i + 7j, b = -4i + 3j

Answer 1

Could it be <-20,21>

Answer 2

hi is that supposed tbe a cross product

Answer 3

does it look like this a X b

Answer 4

No it's 41

Answer 5

oh okay then its dot product

Answer 6

a . b

Answer 7

It's dot product

Answer 8

Yeah (:

Answer 9

a .b = 5*-4 +7*3=1

Answer 10

yo multiply the coefficents of i together, and the coefficients of j together and add them up