一元二次方程是初中数学的知识,到了高中,随着同学们知识面的扩大,这一内容也要随之而深化,下面着重强调四点注意:一、注意ax2+bx+c=0中a≠0这一条件例1解方程(b-a)x2+(a-c)x+(c-b)=0.解依求根公式得x=-(a-c)±(a-c)2-4(b-a) Unary quadratic equation is the knowledge of junior high school mathematics, to high school, with the expansion of students knowledge, this content should be followed by deepening, the following emphasis on four points of attention: First, pay attention to ax2 + bx + c = 0 a ≠ 0 This case of Example 1 solution equation (ba) x2 + (ac) x + (cb) = 0. Solution according to the root formula x = - (ac) ± (ac) 2-4 (ba)