Question

Simplify.

Answer 1

\[V=\frac{ \alpha}{ 2E }-\frac{ \alpha a^2 }{ 2Er^2 }+\frac{ q }{ 4 \pi Er^2 }\]Answer is this: \[-\frac{ \alpha a^2 }{ 2E }+\frac{ q }{ 4\pi E }\]how to get it? I am confused

Answer 2

Cancel out all of the ones that look the same

Answer 3

what do you mean can you give an example?

Answer 4

Destroy all the pairs