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我们知道,如果抛物线y=ax~2+bx+c与x轴有两个交点,横坐标分别是x_1和x_2,则这个抛物线可写成交点式y=a(x…x_1)(x-x_2)。本文提供几个利用交点式求二次函数的解析式的例题,供同学们学习时参考。
We know that if the parabola y=ax~2+bx+c has two intersections with the x axis and the abscissas are x_1 and x_2, then the parabola can be written as a y=a(x...x_1) (x-x_2) ). This article provides several examples of analytical equations that use intersections to find quadratic functions for reference when students learn.