知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=刚刚打错了正:已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
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![知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=刚刚打错了正:已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=](/uploads/image/z/14291480-56-0.jpg?t=%E7%9F%A5%E2%94%82x-3y%3D6%E2%94%82%E4%B8%8E%EF%BC%88x%2B2y%2B1%EF%BC%89%2A%28x%2B2y%2B1%29%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E5%88%99x%3D+%2Cy%3D%E5%88%9A%E5%88%9A%E6%89%93%E9%94%99%E4%BA%86%E6%AD%A3%EF%BC%9A%E5%B7%B2%E7%9F%A5%E2%94%82x-3y%2B6%E2%94%82%E4%B8%8E%EF%BC%88x%2B2y%2B1%EF%BC%89%2A%28x%2B2y%2B1%29%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%EF%BC%8C%E5%88%99x%3D+%2Cy%3D)
知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=刚刚打错了正:已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
刚刚打错了
正:
已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=刚刚打错了正:已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
两式都大于等于0,所以
│x-3y+6│=0 且(x+2y+1)*(x+2y+1) =0
即x-3y+6=0 且x+2y+1=0
所以x=-3,y=1
题错了,两个都是正数
知│x-3y=6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=刚刚打错了正:已知│x-3y+6│与(x+2y+1)*(x+2y+1)互为相反数,则x= ,y=
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