【急需答案】如图抛物线y=-x²+2x+3与x轴交于A,B两点,直线BD的函数表达式为y=-...如图所示,抛物线y=-x²+2x+3与x轴交于A,B两点,直线BD的函数表达式为y=-根号3x+3根号3,
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![【急需答案】如图抛物线y=-x²+2x+3与x轴交于A,B两点,直线BD的函数表达式为y=-...如图所示,抛物线y=-x²+2x+3与x轴交于A,B两点,直线BD的函数表达式为y=-根号3x+3根号3,](/uploads/image/z/1245949-61-9.jpg?t=%E3%80%90%E6%80%A5%E9%9C%80%E7%AD%94%E6%A1%88%E3%80%91%E5%A6%82%E5%9B%BE%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9D%EF%BC%8Dx%26sup2%3B%EF%BC%8B2x%EF%BC%8B3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E7%9B%B4%E7%BA%BFBD%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%B8%BAy%EF%BC%9D%EF%BC%8D%EF%BC%8E%EF%BC%8E%EF%BC%8E%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E6%8A%9B%E7%89%A9%E7%BA%BFy%EF%BC%9D%EF%BC%8Dx%26sup2%3B%EF%BC%8B2x%EF%BC%8B3%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E7%9B%B4%E7%BA%BFBD%E7%9A%84%E5%87%BD%E6%95%B0%E8%A1%A8%E8%BE%BE%E5%BC%8F%E4%B8%BAy%EF%BC%9D%EF%BC%8D%E6%A0%B9%E5%8F%B73x%EF%BC%8B3%E6%A0%B9%E5%8F%B73%2C)
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