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Cum se calculeaza :
[tex]( \frac{1}{2}x-2)^{2} [/tex]


Răspuns :

= x^2/4 - 2x + 4 
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Calculam dupa formula (a-b)²=a²-2ab+b²

=x²/4-2·x/2·2+4
=x²/4-2x+4