uprość wyrażenie (2a-b)2 -(1/2a - 1)(1/2a + 1) - (4a2 +b2)DZIĘKUJĘ
(2a-b)^2 -(1/2a - 1)(1/2a + 1) - (4a2 +b2) = 4a^2-4ab +b^2+1/4a^2-1 - 4a2 -b^2=
-4ab +1/4a^2-1
(2a-b)²-(½a-1)(½a+1)-(4a²+b²)=4a²-4ab+b²-(¼a²+½a-½a-1)-(4a²+b²)= 4a²-4ab+b²-¼a²+1-4a²-b²=-¼a²-4ab+1
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(2a-b)^2 -(1/2a - 1)(1/2a + 1) - (4a2 +b2) = 4a^2-4ab +b^2+1/4a^2-1 - 4a2 -b^2=
-4ab +1/4a^2-1
(2a-b)²-(½a-1)(½a+1)-(4a²+b²)=4a²-4ab+b²-(¼a²+½a-½a-1)-(4a²+b²)= 4a²-4ab+b²-¼a²+1-4a²-b²=-¼a²-4ab+1