Respuesta :

calculista
we have that
a = 8i + 6j,
b = 4i + 5j

a.b-----> 8*4+6*5------> 32+30------> 62

 the answer is 62
Blacklash

Answer:

a.b = 62

Step-by-step explanation:

We have a = 8i + 6j and b = 4i + 5j

a.b = (8i + 6j).(4i + 5j) = 8i . 4i + 8i . 5j + 6j . 4i + 6j . 5j = 8 x 4 + 6 x 5 = 32 + 30 = 62

So a.b = 62