I'm working through an example that looks like a fairly simple Karnaugh map and simplification, but I feel stupid that I can't seem to understand the correct answer.
This is the map:
My groupings:
This is the equation:
But I don't know how it simplifies to the correct answer here:
I understand why the NOT A goes outside of the bracket, but I don't see how the C OR NOT C just becomes a C inside the bracket?