- ( 2x - x2)-[2-3x-(2x2-3x + 4 )] dla x = - jedna druga
3-[-(2x 3x2)+(1-3x-(2x2-3x+x2)]=4x2 Dla x = -0,3
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-(2*1/2-1/2-2)-[2-3*1/2-(2*(1/2)²-3*1/2+4)] = [2-3*1/2*2*1/4-3*1/2+4] = [2-3*1/2*1/2-3*1/2+4] = [2-7/2*1/2-7/2+4] = 2-7/4-7/2+4 = 2-14/8-28/8+4= 2-14/8+4= -214/18