解方程-10x²+1400x+40000=8000
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 09:37:23
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解方程-10x²+1400x+40000=8000
解方程-10x²+1400x+40000=8000
解方程-10x²+1400x+40000=8000
-10x²+1400x+40000=8000
x²-140x-3200=0
(x-160)(x+20)=0
x=160或x=-20