(资料图片仅供参考)
音频解说1、129.1*129.1-129*129.2=129.1²-(129.1-0.1)x(129.1+0.1)=129.1²-129.1²+0.1²=0+0.01=0.01129.1*129.1-129*129.2 = 0.01129.1*129.1-129*129.2=129.1*129.1-(129.1-0.1)*(129.1+0.1)=129.1*129.1-(129.1*129.1-0.1*0.1)=0.01。
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