如图,在平面直角坐标系中,0为原点,点A在x轴的正半轴上,点B在y轴的正半轴上,OB=2OA.抛物线m:y=x的平方+bx+2经过A.B点,顶点为D (1)求抛物线m的解析式 (2)将线段AB绕点A顺时针旋转90°得到线
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![如图,在平面直角坐标系中,0为原点,点A在x轴的正半轴上,点B在y轴的正半轴上,OB=2OA.抛物线m:y=x的平方+bx+2经过A.B点,顶点为D (1)求抛物线m的解析式 (2)将线段AB绕点A顺时针旋转90°得到线](/uploads/image/z/6950413-37-3.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C0%E4%B8%BA%E5%8E%9F%E7%82%B9%2C%E7%82%B9A%E5%9C%A8x%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%2C%E7%82%B9B%E5%9C%A8y%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%2COB%3D2OA.%E6%8A%9B%E7%89%A9%E7%BA%BFm%EF%BC%9Ay%3Dx%E7%9A%84%E5%B9%B3%E6%96%B9%2Bbx%2B2%E7%BB%8F%E8%BF%87A.B%E7%82%B9%2C%E9%A1%B6%E7%82%B9%E4%B8%BAD+++%EF%BC%881%EF%BC%89%E6%B1%82%E6%8A%9B%E7%89%A9%E7%BA%BFm%E7%9A%84%E8%A7%A3%E6%9E%90%E5%BC%8F++%EF%BC%882%EF%BC%89%E5%B0%86%E7%BA%BF%E6%AE%B5AB%E7%BB%95%E7%82%B9A%E9%A1%BA%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC90%C2%B0%E5%BE%97%E5%88%B0%E7%BA%BF)
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