Vector difference help

1. The problem statement, all variables and given/known data

hi i am having problems with this problem

Vector A has a magnitude of 8.00 units and makes an angle of 45.0 degrees with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A+B and (b) the vector difference A-B.

2. Relevant equations

3. The attempt at a solution
Do i just use the graph to count?
What about the difference vector?
Re: Vectors

What is the graphical method of adding two vectors? Subtracting one vector from the other is defined as simply adding the negative of the second vector to the first. Using a parallelogram made up of the vectors, you can see both of these operations.
Re: Vectors

thank you

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