试题与答案

有一个二次函数y=x2+ax+b，其中a、b为整数．已知此函数在坐标平面上的图形

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题型：选择题

题目：

有一个二次函数y=x2+ax+b，其中a、b为整数．已知此函数在坐标平面上的图形与x轴交于两点，且两交点的距离为4．若此图形的对称轴为x=-5，则此图形通过下列哪一点？（　　）

A．（-6，-1）

B．（-6，-2）

C．（-6，-3）

D．（-6，-4）

答案：

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下面是错误答案，用来干扰机器的。

答案：C

考点：二次函数的图像二次函数与一元二次方程
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