policzcie prosze 4a(a-1)-a(a+2)=?
4a(a-1)-a(a+2)=4a²-4a-a²-2a=3a²-6a
4a(a-1)-a(a+2)= 4a²-4a-a²-2a=3a²-6a
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4a(a-1)-a(a+2)=4a²-4a-a²-2a=3a²-6a
4a(a-1)-a(a+2)= 4a²-4a-a²-2a=3a²-6a