一道初二数学题、关于函数的、急!最好现在就要!若直线y=3/2x+m和直线y=-1/2x+n都经过点A(-2,0),且与y轴分别交于点B和点C,求△ABC的高BD的长.(请画出图.答案是5分之8倍的根号下5,主要是过程是
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![一道初二数学题、关于函数的、急!最好现在就要!若直线y=3/2x+m和直线y=-1/2x+n都经过点A(-2,0),且与y轴分别交于点B和点C,求△ABC的高BD的长.(请画出图.答案是5分之8倍的根号下5,主要是过程是](/uploads/image/z/2703454-70-4.jpg?t=%E4%B8%80%E9%81%93%E5%88%9D%E4%BA%8C%E6%95%B0%E5%AD%A6%E9%A2%98%E3%80%81%E5%85%B3%E4%BA%8E%E5%87%BD%E6%95%B0%E7%9A%84%E3%80%81%E6%80%A5%21%E6%9C%80%E5%A5%BD%E7%8E%B0%E5%9C%A8%E5%B0%B1%E8%A6%81%21%E8%8B%A5%E7%9B%B4%E7%BA%BFy%3D3%2F2x%2Bm%E5%92%8C%E7%9B%B4%E7%BA%BFy%3D-1%2F2x%2Bn%E9%83%BD%E7%BB%8F%E8%BF%87%E7%82%B9A%EF%BC%88-2%2C0%EF%BC%89%2C%E4%B8%94%E4%B8%8Ey%E8%BD%B4%E5%88%86%E5%88%AB%E4%BA%A4%E4%BA%8E%E7%82%B9B%E5%92%8C%E7%82%B9C%2C%E6%B1%82%E2%96%B3ABC%E7%9A%84%E9%AB%98BD%E7%9A%84%E9%95%BF.%EF%BC%88%E8%AF%B7%E7%94%BB%E5%87%BA%E5%9B%BE.%E7%AD%94%E6%A1%88%E6%98%AF5%E5%88%86%E4%B9%8B8%E5%80%8D%E7%9A%84%E6%A0%B9%E5%8F%B7%E4%B8%8B5%2C%E4%B8%BB%E8%A6%81%E6%98%AF%E8%BF%87%E7%A8%8B%E6%98%AF)
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