Answer:
a. = 11i - 5j
b. = -i + 13j
Step-by-step explanation:
from the question we were given
v = 5i + 4j
w = 6i - 9j
we are to find
a. v + w
b. v - w
a) v + w
(5i + 4j )+ (6i - 9j)
5i + 4j + 6i - 9j
collect the like terms
11i - 5j
b) v - w
(5i + 4j) -( 6i - 9j)
5i + 4j -6i + 9j
collect the like terms
5i - 6i +4j + 9j
-i + 13j
