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\/(2+3\/2)^2=|2+3\/2 |= 2+3\/2
bo.2+3\/2 >0
22-12\/2= 4-12\/2+18=(2-3\/2)^2
\/(2-3\/2)^2=|2-3\/2| = -2+3\/2
bo 2-3\/2 <0
zatem wyrazenie z pytania
= 2+3\/2 - (-2+3\/2)= 2 + 3\/2 +2 - 3\/2 = 4