How the value come 0.0012 and others

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Here there are corresponding terms given in terms of x and x=0.1 1st term is 2.3o26 x = 2.3026(0.1)=0.23026 2nd term 2.65095 x^2 = 2.65095 (0.1*0.1)= 0.0265095 rounding off to 5 te...