(100-x)(80-x)=7644的解题步骤及答案

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(100-x)(80-x)=7644的解题步骤及答案(100-x)(80-x)=7644的解题步骤及答案(100-x)(80-x)=7644的解题步骤及答案8000-100x-80x+x2=7644x

(100-x)(80-x)=7644的解题步骤及答案
(100-x)(80-x)=7644的解题步骤及答案

(100-x)(80-x)=7644的解题步骤及答案
8000-100x-80x+x2=7644x2-180x+356=0(x-2)(x-178)=0x=2、178