Revered members,
Please go through my attachment. While calculating the output of Non inverting terminal, V+ is explicitly calculated. But when arriving at the expression for the output of Inverting terminal why not V- is not calculated? It is simply mentioned as V2. Members, could you elaborate?

 

This is not a physics question, so I am moving it to the appropriate forum.

 

Because in the calculation of Vo2, v- is a virtual ground or 0V. The expression for Vo2 can be calculated by summing the currents at v-. They just skipped this step. Once you do the calculation once, you just use the result in subsequent analysis.