抛物线y=-x²+7x-10与x两交点距离为抛物线y=ax²+bx+c(a≠0)过(1,2)和(-1,-6)两点,则a+c=
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![抛物线y=-x²+7x-10与x两交点距离为抛物线y=ax²+bx+c(a≠0)过(1,2)和(-1,-6)两点,则a+c=](/uploads/image/z/6971988-12-8.jpg?t=%E6%8A%9B%E7%89%A9%E7%BA%BFy%3D-x%26%23178%3B%2B7x-10%E4%B8%8Ex%E4%B8%A4%E4%BA%A4%E7%82%B9%E8%B7%9D%E7%A6%BB%E4%B8%BA%E6%8A%9B%E7%89%A9%E7%BA%BFy%3Dax%26%23178%3B%2Bbx%2Bc%28a%E2%89%A00%EF%BC%89%E8%BF%87%EF%BC%881%2C2%29%E5%92%8C%EF%BC%88-1%2C-6%EF%BC%89%E4%B8%A4%E7%82%B9%2C%E5%88%99a%2Bc%3D)
抛物线y=-x²+7x-10与x两交点距离为抛物线y=ax²+bx+c(a≠0)过(1,2)和(-1,-6)两点,则a+c=
抛物线y=-x²+7x-10与x两交点距离为
抛物线y=ax²+bx+c(a≠0)过(1,2)和(-1,-6)两点,则a+c=
抛物线y=-x²+7x-10与x两交点距离为抛物线y=ax²+bx+c(a≠0)过(1,2)和(-1,-6)两点,则a+c=