(40-40x)x+40x=40-32.4

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 20:54:15
(40-40x)x+40x=40-32.4

(40-40x)x+40x=40-32.4
(40-40x)x+40x=40-32.4

(40-40x)x+40x=40-32.4
40x-40x2+40x=7.8
40x2-80x+7.8=0