Hint 1 Hint 2

For vectors B=3x^6y^\displaystyle \vec{{B}}=-{3}\hat{{x}}-{6}\hat{{y}} and A=6x^3y^\displaystyle \vec{{A}}=-{6}\hat{{x}}-{3}\hat{{y}} calculate:

  1.  A+B=\displaystyle \vec{{A}}+\vec{{B}}=  x^+\displaystyle \hat{{x}}+  y^\displaystyle \hat{{y}} 
                                 
    A+B=\displaystyle {\left|\vec{{A}}+\vec{{B}}\right|}= 
    Direction in degrees (between 0° and 360°) relative to +x\displaystyle +{x}-axis:
  2.  AB=\displaystyle \vec{{A}}-\vec{{B}}=  x^+\displaystyle \hat{{x}}+  y^\displaystyle \hat{{y}} 
                                  
    AB=\displaystyle {\left|\vec{{A}}-\vec{{B}}\right|}= 
    Direction in degrees (between 0° and 360°) relative to +x\displaystyle +{x}-axis: