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dla x= -1
x³-2x²+x \ 2x-3=(-1)³-2(-1)²+(-1)\2(-1)-3=-1-2-1\-2-3=-4\-5=4\5
dla x=0
x³-2x²+x \ 2x-3=0³-2(0)²+0\2*0-3=0\-3=0
dla x=½
x³-2x²+x \ 2x-3=(½)³-2(½)²+½\2*½-3=⅛-2(¼)+½\1-3=⅛-½+½\-2=⅛\-2=⅛*(-½)= -1/16