数学几何和一元二次方程!如图所示,要在地面BC=60cm,高AD=120cm的三角形余料ABC种截取一个矩形EFGH,使点H在AB上,G在AC上,点E,F在BC上,AD交HG于点M.(1)设矩形EFGH的长HG=y,宽HE=x,确定y与x的函数关系式;(2
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![数学几何和一元二次方程!如图所示,要在地面BC=60cm,高AD=120cm的三角形余料ABC种截取一个矩形EFGH,使点H在AB上,G在AC上,点E,F在BC上,AD交HG于点M.(1)设矩形EFGH的长HG=y,宽HE=x,确定y与x的函数关系式;(2](/uploads/image/z/12539371-67-1.jpg?t=%E6%95%B0%E5%AD%A6%E5%87%A0%E4%BD%95%E5%92%8C%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%21%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%A6%81%E5%9C%A8%E5%9C%B0%E9%9D%A2BC%3D60cm%2C%E9%AB%98AD%3D120cm%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E4%BD%99%E6%96%99ABC%E7%A7%8D%E6%88%AA%E5%8F%96%E4%B8%80%E4%B8%AA%E7%9F%A9%E5%BD%A2EFGH%2C%E4%BD%BF%E7%82%B9H%E5%9C%A8AB%E4%B8%8A%2CG%E5%9C%A8AC%E4%B8%8A%2C%E7%82%B9E%2CF%E5%9C%A8BC%E4%B8%8A%2CAD%E4%BA%A4HG%E4%BA%8E%E7%82%B9M.%281%29%E8%AE%BE%E7%9F%A9%E5%BD%A2EFGH%E7%9A%84%E9%95%BFHG%3Dy%2C%E5%AE%BDHE%3Dx%2C%E7%A1%AE%E5%AE%9Ay%E4%B8%8Ex%E7%9A%84%E5%87%BD%E6%95%B0%E5%85%B3%E7%B3%BB%E5%BC%8F%EF%BC%9B%282)
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