求解[80-2(x-10)]x=1200thanks

来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/11 10:37:33
求解[80-2(x-10)]x=1200thanks求解[80-2(x-10)]x=1200thanks求解[80-2(x-10)]x=1200thanks(80-2x+20)x=1200-2x

求解[80-2(x-10)]x=1200thanks
求解[80-2(x-10)]x=1200
thanks

求解[80-2(x-10)]x=1200thanks
(80-2x+20)x=1200
-2x²+100x=1200
x²-50x+600=0
(x-20)(x-30)=0
x=20,x=30