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大家知道,若u是方程ax~2+bx+c=0(a≠0)的根,则au2+bu+c=0.反过来也是成立的.利用上述定义解题,可起到化繁为简、化难为易的作用.下面举例说明.一、化简
We all know that if u is the root of the equation ax ~ 2 + bx + c = 0 (a ≠ 0), then au2 + bu + c = 0 and vice versa is also true. For Jane, the difficulty of the role of easy. The following examples. First, simplify