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一、注重互动参与1.(2005年海安市)请给出一元二次方程x~2-8x+_=0的一个常数项,使这个方程有两个不相等的实数根。(标有年份和省市名称的题目都是相应的中考题,下同)
First, focus on interactive participation 1. (Haian City, 2005) Please give a constant term for the one-dimensional quadratic equation x~2-8x+_=0 so that this equation has two unequal real roots. (The titles marked with the year and the name of the province and city are the corresponding exam questions, the same below)