Answer:
x,y
(1,3)
Step-by-step explanation:
Answer:

Step-by-step explanation:
We want to solve for
in 
We expand to get:
We group similar terms to get:

This simplifies to 
Divide both sides by 7.8 to get

The norm of a vector
is equal to the square root of the inner product of
with itself.
a. 
b. 