(Solved): Derive the gain equation for a differential amplifier, as shown in Figure A2. You should arrive at ...

Derive the gain equation for a differential amplifier, as shown in Figure A2. You should arrive at the following equation: \[ V_{o}=\frac{R_{2}}{R_{1}}\left(V_{1} \frac{R_{4}\left(R_{1}+R_{2}\right)}{R_{2}\left(R_{3}+R_{4}\right)}-V_{2}\right) \] Figure A2: A Differential Amplifier