8x=9x×(x-40)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/25 17:00:15
8x=9x×(x-40)8x=9x×(x-40)8x=9x×(x-40)8x=9x×(x-40)8x-9x×(x-40)=0x×[8-9×(x-40)]=0x=08-9×(x-40)=0x1=0x2=

8x=9x×(x-40)
8x=9x×(x-40)

8x=9x×(x-40)
8x=9x×(x-40)
8x-9x×(x-40)=0
x×[8-9×(x-40)]=0
x=0 8-9×(x-40)=0
x1=0 x2=40又8/9