Odpowiedź:
-(a+b) = -a-b
-(-a-b) = a+b
-(a-b) = -a+b
-(-a+b) = a-b
:]
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Odpowiedź:
-(a+b) = -a-b
-(-a-b) = a+b
-(a-b) = -a+b
-(-a+b) = a-b
Odpowiedź:
-(a+b) = -a-b
-(-a-b) = a+b
-(a-b) = -a+b
-(-a+b) = a-b
:]