2 - (-4) is equal to 2 + 4.
The answer to that is 6.
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Six! Although this might sound weird, if you have a minus sign in front of something you can think of it as the opposite of that number (the opposite of -2 is 2).
-6
Negative sixty-four minus four squared is equal to -80.
-15 minus -4 is -11.
Treat the "plus positive X" as "minus negative X". Example: Positive two plus positive two equals positive four. Positive two minus negative two equals positive four.
the answer is "minus four", also known as "negative four".