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0,76(0,76+0,24-0,26/0,76)=0,76(1-0,26/0,76)=0,76-0,26=0,5
b)x³-0,12x²+x+0,88=x²(x-0,12+1/x+0,88/x²)
(0,12)²(0,12-0,12+1/0,12+0,88/(0,12)²)=0,12+0,88=1