Answer:
u - v = 17i -13j
Step-by-step explanation:
Rewrite u=9i-9j and v=-8i 4j vertically:
u=9i-9j
v=-8i + 4j
We want to subtract the second equation from the first:
u=9i-9j
v=-8i + 4j
-----------
u - v = 17i -13j
Note: I assumed that a " + " sign precedes 4j in the second equation.
