For the Equation, Determine the Constants a and B That $$\frac { x - 3 } { x ^ { 2 } } = \frac { A } { x } + \frac { B } { x ^ { 2 } }$$

Multiple Choice

For the equation, determine the constants A and B that make the equation an identity.
- $$\frac { x - 3 } { x ^ { 2 } } = \frac { A } { x } + \frac { B } { x ^ { 2 } }$$

A) $A = - 3 , B = 1$
B) $\mathrm { A } = 3 , \mathrm {~B} = 1$
C) $\mathrm { A } = 1 , \mathrm {~B} = - 3$
D) $A = 1 , B = 3$