含参数二次函数题是一个重要题型,形式新颖、解法灵活、技巧性强,同学们解这类题常感困难,甚至不知从何入手,为帮助同学们解决这个问题,现举几例说明.例1已知抛物线y=x~2-(k-1)x-3k-2交x轴于A(α,0),B(β,0)两点,且α~2+2β=17,求x的值.解∵抛物线y=x~2-(k-1)-3k-2与x轴相交于A(α,0)、B(β,0), With the parameter quadratic function problem is an important question, the form of novel, flexible solution, highly skilled, students are often difficult to understand such questions, or even do not know where to start, to help students solve this problem, Example 1 It is known that the parabola y = x ~ 2- (k-1) x-3k-2 intersects the x axis at two points A (α, 0) and B (β, 0) = 17, find the value of x. Solution Parabola y = x ~ 2- (k-1) -3k-2 intersects the x axis at A (α, 0), B