JLandi526 JLandi526

08-05-2020
Mathematics

contestada

Find the Dot Product if u=8i-7j and v=3i-4j?

Respuesta :

11-05-2020

Answer:

52

Step-by-step explanation:

If u=(a1i+b1j)=(a1,b1) and v=(a2i+b2j)=(a2,b2), then the dot (scalar) product is:

u.v=(a1,b1).(a2,b2)

a1b1+a2b2

u.v=(8,-7).(3,−4)

(8)(3)+(-7)(−4)

24+28=52

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