若一元二次方程ax平方+bx+c=0的根为x1=-5,x2=2则抛物线y=ax平方+bx+c与x轴交点坐标为?若抛物线y=3x平方与直线y=x+4的交点坐标为(-1,3),(4/3,16/3)则方程3x平方=x+4的解是 我都遗忘了
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![若一元二次方程ax平方+bx+c=0的根为x1=-5,x2=2则抛物线y=ax平方+bx+c与x轴交点坐标为?若抛物线y=3x平方与直线y=x+4的交点坐标为(-1,3),(4/3,16/3)则方程3x平方=x+4的解是 我都遗忘了](/uploads/image/z/2094420-12-0.jpg?t=%E8%8B%A5%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Bax%E5%B9%B3%E6%96%B9%2Bbx%2Bc%3D0%E7%9A%84%E6%A0%B9%E4%B8%BAx1%3D-5%2Cx2%3D2%E5%88%99%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%E5%B9%B3%E6%96%B9%2Bbx%2Bc%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E7%82%B9%E5%9D%90%E6%A0%87%E4%B8%BA%3F%E8%8B%A5%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D3x%E5%B9%B3%E6%96%B9%E4%B8%8E%E7%9B%B4%E7%BA%BFy%3Dx%2B4%E7%9A%84%E4%BA%A4%E7%82%B9%E5%9D%90%E6%A0%87%E4%B8%BA%EF%BC%88-1%2C3%EF%BC%89%2C%EF%BC%884%2F3%2C16%2F3%EF%BC%89%E5%88%99%E6%96%B9%E7%A8%8B3x%E5%B9%B3%E6%96%B9%3Dx%2B4%E7%9A%84%E8%A7%A3%E6%98%AF+%E6%88%91%E9%83%BD%E9%81%97%E5%BF%98%E4%BA%86)
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